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1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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Soulless99
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Jan 26, 2007, 11:02 PM
Post #1 of 22
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1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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Rad got dirty, blocked, over heated...never let it hit the red mark..stopping and going all the way home...found the problem with a rad pressure tester. a leak in the intake manifold gasket. got that changed. put in a new thermostat, and flushed the rad twice. had trouble getting the fuel lines back in but finally got them. now it misses, lopes, really bad. doesnt have power, takes more RPMs to go uphill. have been told it could be that the spark plugs got drowned from the coolant...maybe we didnt get the distributor back in in just the right spot....also dad wonders if the fuel line little rubber gaskets got smushed getting them back in. sounds like an air leak but we sprayed starter fluid around hoses and all seems ok with them. any ideas whats next. we're home mechanics, never call for back up. just dont have the money...gets too bad i'll send her to the scrape yard.
Chevy's Rock!
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jan 27, 2007, 8:48 AM
Post #2 of 22
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Re: 1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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If it was running ok when you did this than retrace what you did. Plugs could have been damages or wires just from removing them, T
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Soulless99
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Jan 27, 2007, 9:11 AM
Post #3 of 22
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Re: 1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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we didnt take the spark plugs out...or the wires off of them....just off the distributor. could the plugs still have gotten damaged?...we've retraced down to the the plugs and plug wires so it almost has to be with them
Chevy's Rock!
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jan 27, 2007, 12:54 PM
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Re: 1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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Any vehicle doesn't really like having wiring manhandled when they get some years on them. That goes for vacuum hoses too. If you look at the plugs they should indicate which one is trouble or more if so. You can buy just one plug wire but if you need a few you don't save that way, T
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steve01832
Veteran
Jan 28, 2007, 3:05 AM
Post #5 of 22
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Re: 1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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Start by double checking the firing order at the cap. You may have crossed wires. If that's ok check the EGR valve to make sure the pintle is fully seated closed. If that checks out ok then it's back to basics. Check compression and fuel pressure. Check that every plug wire has spark getting to plug. Make sure every injector is firing, etc...
By the way, which engine is in this truck?
Steve
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Soulless99
User
Jan 29, 2007, 10:52 PM
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Re: 1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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its a V6...i wanta say 4.3 but i get it mixed up sometimes with our old van...3.5? anyway its a 4 door, 4wheel drive automatic.
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steve01832
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Jan 31, 2007, 4:52 AM
Post #7 of 22
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Re: 1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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Have you done the procedure I mentioned in my previous post yet?
Steve
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Soulless99
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Jan 31, 2007, 5:38 PM
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Re: 1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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we got the firing order right. i've checked that. how is the best way to check the injectors. and is there a trick to checking to see if each spark plug wire is firing? i'm waiting on dad's day off to replace the plugs..there is one under the steering wheel column that i just cannot get my ratchet to so he says we'll have to jack up the motor to get to it
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Soulless99
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Feb 23, 2007, 9:48 AM
Post #9 of 22
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Re: 1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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ok...i got all the spark plugs changed but one...one is behind the steering column bar that goes all the way down...but no change at all, changed the wires too after dad got alittle rough with one that was stuck on with greasy oil. check the egr valve, nothing there..no carbon, doesnt stick. dad thinks maybe when we put the two fuel lines in the top back in and had some trouble with the little rubber gaskets, the new ones that came with the manifold gasket seemed to be fat and kept sliding up and down too much maybe they got pinched down inside and they aint lettin enough gas in...seems you have to give too much gas to get it to change gears. runs hard, uses alot of rpms and you can feel the roughness as you're driving the most...at idle still sounds rough. 4 wheel drive still works fine. cant go above 40 going up hill without flooring it, which i just wont do. could it be the fuel lines?
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Soulless99
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Feb 23, 2007, 9:51 AM
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Re: 1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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and the compression is fine, dont know how to check fuel pressure, myself, and i've went out in the dark and checked for any sparks jumping at the plugs and wires, but like i said they are all brand new now.
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steve01832
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Feb 24, 2007, 4:48 AM
Post #11 of 22
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Re: 1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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You will need to hook a fuel pressure guage up to the test port on the fuel line. I would also recheck the distributor. Usually with these, if the distributor is off even 1 tooth, the MIL turns on. Start by getting #1 cylinder up on top dead center compression. Make sure the timing mark on the balancer is zeroed out. Now, mark where #1 is on the cap. Remove the cap and make sure the rotor is pointing directly at it. If it isn't, remove the distributor and reinstall properly. Also, make sure the black connector is securely plugged into the sensor. This is the cam sensor. If all checks out ok with the distributor, double check the big plug on the injector. Make sure that is on properly and is tight. Double check that all of the sensors are plugged in as well. Start there and post back if we need to go further.
Steve
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Soulless99
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Mar 6, 2007, 3:43 PM
Post #12 of 22
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Re: 1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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double checked distributor and it was right, all plugs are plugged in, got the last spark plug in, fuel lines are good...still no change
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black bear
Novice
Mar 10, 2007, 2:47 PM
Post #13 of 22
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Re: 1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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to me it still sounds like you don't have the distributor in right so remove #1 spark plug and pull the coil wire so it woun't start and put your finger in the plug hole and tap the starter till you feel pressure on your finger then turn the motor till it is on 0 degrees then remove dist cap and see if the dist rotor is pointing to the little 6 stamped on the dist see attachment if it is not remove dist turn it so when it is in all the way it is lined up with the 6!
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Soulless99
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Mar 11, 2007, 8:49 AM
Post #14 of 22
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Re: 1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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thats what we did. dad stuck his finger in and i turned the motor as soon as he felt it we stopped...everything lined up right. just for kicks we moved it ahead one click and back one click both made it worse in different ways...i'm gonna go have them put it on a tester of some sort...my dad's idea...and get a print out of whats wrong. i know its something we did but we cant find anything wrong with what we did now
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Soulless99
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Apr 12, 2007, 10:06 PM
Post #15 of 22
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Re: 1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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ok pulling this back to the top again...*sighs*...we had a fuel line that comes out of the fuel filter...i think...the end pointing away from the gas tank...started spewing gas around where the line comes out...wouldnt start..so we changed the fuel filter and seemed to fix that problem..thought maybe the fuel filter had been clogged or sucking air causing our problem but it didnt help...still runs the same just not blowing out gas now. we gave up and went to have her...*christine we call her now for obvious reasons* hooked up to the computer to run the code....anyway...wouldn't work. something must be wrong with the plug under the steering wheel that they plug the thing into..big surprise...so i guess we'll just drive it til it blows up..thanks for trying to help everyone. i really appreciate all the ideas and helpful comments. i'll report back when she's finally dead so we can all rest peacefully knowing one less evil thing is gone :D
Chevy's Rock!
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steve01832
Veteran
Apr 13, 2007, 3:37 AM
Post #16 of 22
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Re: 1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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On the data link connector under the dash, there are only 4 wires needed to communicate with the scan tool. If the scan tool powers up with the key off, the orange wire at the connector is ok. Terminals 4 and 5 are ground. Check both of these with a meter to confirm they are ok. The last wire should be purple. I can't remember which pin it is but this is serial data. If this wire is good from the connector to the PCM and the scan tool displays no communication with vehicle, confirm that the key is on, if it is, you may need a new PCM. Good luck and let us know how it pans out.
Steve
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sbake58
Novice
May 27, 2007, 6:18 PM
Post #17 of 22
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Re: 1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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4.3 V6 intake manifold gasket replacement, and now it runs poorly? Sounds like either you've installed the wrong gaskets or installed them incorrectly. It happens. Could be leaking either vacuum or water internally which causes the ECM to compensate, making it run like it's a piece.
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Soulless99
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Aug 6, 2007, 10:13 AM
Post #18 of 22
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Re: 1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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i know the gaskets were installed right, there's no doubt that they were. it does sound like a vaccume leak but i can't find it if there is. now after we drive for a long distance steam comes from around the oil stick area, maybe all the way down to the plugs but i cant see as it is steaming when i try to look and if its stops steaming i cant find where it was coming from. it doesnt over heat, its not losing water/coolant, nothing seems to happen except steam. my signal lights stopped working, they would flash alittle then stop, and now the four wheel drive wont come on. i push the button for it and it just blinks fast for both hi and low...now the 4wh hi light is on and the 2wh light blinks but wont stay on, yet it drives like its in 2wh drive....i'm pullin my hair out over this...i'm gonna get a bike i think and just pedal my way around............ps we never found the first problem, it still runs like crap and uses way too much gas and has no pull going up hill
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Soulless99
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Aug 7, 2007, 4:11 PM
Post #19 of 22
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Re: 1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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bringing this back to the top...the 4 wheel drive problem was a blown fuse...we're gonna change the valve cover gasket on the left side, and replace the flasher to see if that helps the signals
Chevy's Rock!
(This post was edited by Soulless99 on Aug 7, 2007, 4:13 PM)
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billygnoses
New User
Aug 10, 2007, 4:50 PM
Post #20 of 22
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Re: 1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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when you lined up #1 did you look on the inside of the cap or outside, also there is a mark to line up on the inside,I'd almost put money on your problem being the timing
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Soulless99
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Aug 30, 2007, 10:31 PM
Post #21 of 22
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Re: 1997 Chevy 4X4 Blazer not running good after intake manifold gasket
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finally got it to a shop for a test...number four cylinder isnt working. he tested a few things...thought maybe i didnt know how to put my plugs in right...but ended up saying that its most likely a problem with the spider...either the whole thing or just one injector. the guy at advance auto said its probably the one injector that works with number four cylinder and that that guy woulda knowed which one just didnt wanta tell me so i'd let him do it...noone works on my vehicle..if it gets screwed up it'll be my fault or my dad's...plus they charge too much for labor around here. so...i'm probably gonna need some pointers and stuff once i get set in on the spider problem. now...on to some more problems...i'll start a new thread for them
Chevy's Rock!
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