Main IndexAuto Repair Home Search Posts SEARCH
POSTS
Who's Online WHO'S
ONLINE
Log in LOG
IN









1998 chevy malibu


  Email This Post



buddy56
User

Jan 4, 2013, 8:58 PM

Post #1 of 23 (1503 views)
Shortcut
1998 chevy malibu Sign In

hi i am hoping someone can help me. i have a 98 chevy malibu 3.1l with 168000 miles. the problem is it idles very rough. i replaced the lower intake gasket because of the coolant leak, did a tune up(fuel filter, plugs, wires, pcv valve, air filter, oil change every 3000 miles, and all other maintenance. i sprayed carb cleaner around the intake but didnt find any leaks. what else should i check.thanks for your help.


Sidom
Veteran / Moderator
Sidom profile image

Jan 4, 2013, 9:45 PM

Post #2 of 23 (1480 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

Is the check engine light on Buddy?....If it is, pull the codes and post them here

How was it running before the gasket replacement?


Also double check your firing order






__________________________________________________________________________________________



(This post was edited by Sidom on Jan 4, 2013, 9:46 PM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jan 4, 2013, 9:45 PM

Post #3 of 23 (1477 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

Have the computer scanned to see if there are any stored codes in there.




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



buddy56
User

Jan 4, 2013, 9:47 PM

Post #4 of 23 (1468 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

thanks guys for such a quick reply. no there are no codes. i had a code for a cyl 3 misfire but that was cause of a loose plug wire. it ran about the same before the gasket replacement. i replaced it cause it was leaking coolant.


buddy56
User

Jan 4, 2013, 9:49 PM

Post #5 of 23 (1459 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

the firing order is not adjustable. i have a waste spark system. all the plugs were gapped (checked) before installation. and the wires were replace one by one to avoid mixing them up.


(This post was edited by buddy56 on Jan 4, 2013, 9:50 PM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jan 4, 2013, 10:09 PM

Post #6 of 23 (1448 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

Of course the firing order can be wrong.
Here's the order it should be in.







~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



buddy56
User

Jan 7, 2013, 7:26 PM

Post #7 of 23 (1400 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

sorry for the late reply. i did the tune up myself and i did not mix up any wires. i took them off one a a time and did the plug and wire at the same time.


Discretesignals
Veteran / Moderator
Discretesignals profile image

Jan 7, 2013, 8:29 PM

Post #8 of 23 (1394 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

Does it only idle rough? How does the engine run at higher rpms? Are you getting any trouble codes now?





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


buddy56
User

Jan 7, 2013, 9:12 PM

Post #9 of 23 (1388 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

yes. all it does is idle rough. on the highway it runs good. it revs good and there are no check engine lights. i have a code for the trans range sensor but it doesnt set off the light. i doubt that would cause this issue.


Discretesignals
Veteran / Moderator
Discretesignals profile image

Jan 7, 2013, 9:25 PM

Post #10 of 23 (1387 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

Does your scanner have the ability to monitor data stream information?

Did you reuse the EGR gasket? Check to make sure the EGR gasket is causing a leak and the EGR gasket isn't on backwards. Don't spray carb cleaner around the EGR valve, it will ignite.

Also make sure that your EVAP purge solenoid vacuum line and line to the canister is plugged in





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Jan 7, 2013, 10:02 PM)


Sidom
Veteran / Moderator
Sidom profile image

Jan 7, 2013, 11:38 PM

Post #11 of 23 (1374 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

That's kinda odd there is no codes being set....

If this problem is just at idle & when in drive sitting,, you may want to take a quick look at the motor mounts.........Jack up the engine with a jack & block of wood, just enough to get the weight off the mounts, and see if it does anything for your problem.






__________________________________________________________________________________________



(This post was edited by Sidom on Jan 7, 2013, 11:39 PM)


buddy56
User

Jan 8, 2013, 6:14 PM

Post #12 of 23 (1322 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

thanks i will try those suggestions. yes i have a autel scanner and it is able to show live data. i was told by a more experienced tech (bmw foreman) that it could be the mounts. i think its rough in neutral and park. but its really bad in gear. i could see the mirrors shaking. also i did have an issue with the egr valve. can it be cleaned.


Discretesignals
Veteran / Moderator
Discretesignals profile image

Jan 9, 2013, 7:58 AM

Post #13 of 23 (1314 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

What is the issue with the EGR valve? Most techs can tell the difference between an engine vibration from motor mounts and a vibration from misfiring, so Sid and your tech is probably pointing you in the right direction.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


buddy56
User

Jan 9, 2013, 6:00 PM

Post #14 of 23 (1294 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

well i spoke to two different techs. one tech used the TECH 2 scanner and we saw that the egr valve was open a bit at idle. so we tried to free it up by using the scanner to open and close the valve. also i sprayed carb cleaner in it and let it sit to loosen the carbon. (is that a good way to clean it?) then the bmw tech did not look at the car. i spoke to him and he said it could be a mount since it was happening when it is in gear. i dont feel anything in park but im not too sure if it is rough in park also. but in drive its kinda bad. i feel it in the seat and steering wheel and i also see the side mirrors shaking.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jan 9, 2013, 6:04 PM

Post #15 of 23 (1290 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

An EGR valve not closing is a problem and that has to be resolved. If it won't seat on it's own, then you will have to replace it.




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



buddy56
User

Jan 9, 2013, 9:16 PM

Post #16 of 23 (1274 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

it was not staying open fully. it was only open a little. can it be cleaned?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jan 9, 2013, 9:19 PM

Post #17 of 23 (1269 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

A little open at idle is a problem. Cleaning likely won't work. You can't access the inside at all. It should be replaced. If the engine has a lot of carbon, it could happen again if a loose piece of carbon gets caught in it.




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



buddy56
User

Jan 9, 2013, 9:34 PM

Post #18 of 23 (1260 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

so how would i be able to clean the carbon inside the engine?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jan 9, 2013, 9:37 PM

Post #19 of 23 (1255 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

Many shops offer an Induction system service that will breakup the carbon.




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



buddy56
User

Jan 9, 2013, 9:38 PM

Post #20 of 23 (1249 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

is that the cleaning that uses the walnut shells?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jan 9, 2013, 9:48 PM

Post #21 of 23 (1245 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

I have no idea what that is.




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



buddy56
User

Jan 9, 2013, 9:50 PM

Post #22 of 23 (1240 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

there was a cleaning where crushed walnuts is used to clean carbon.


Sidom
Veteran / Moderator
Sidom profile image

Jan 9, 2013, 10:14 PM

Post #23 of 23 (1235 views)
Shortcut
Re: 1998 chevy malibu [In reply to] Sign In

You put crushed walnuts inside the intake & then squirrels go inside the intake to get the nuts & their tails remove all the carbon from the intake........




There is also a method that is like sand blasting but instead of using sand or glas$ beads.....it uses crushed walnut shells....






__________________________________________________________________________________________



(This post was edited by Sidom on Jan 9, 2013, 10:15 PM)




Advertising


  Email This Post
 
 






Latest Forum Post

I apologize I have not got a lot of time in it so far, so I do not have a lot of...


I have a 1992 ford ranger 3.0l v6 5 speed. today i ran out of gas and when i got...


Hello I have a 1993 Toyota Corolla w/1.8L and 3 sp +overdrive tranny. I took it ...


2008 Nissan Sentra 2.0 50000 Miles The trunk wouldn't open neither with the rem...


Hey people, Just as soon as I've got rid of one car and got another, I've got a...


on a 1998 Chrysler cirrus the heater blows warm thru the vents. When u turn it o...


Feed Button






Automotive Forum Categories
AC Auto Repair
Auto Body Repair
Auto Insurance
Automotive Repair
Automotive Wiring
Automotive World
Brake Systems
Car Care Tips
Car Racing
Car Shows and Events
Car Stereo Repair
Car Troubleshooting
Engine and Car Noises
Engine Fault Codes
Engine Troubleshooting
Exhaust System Repair
Gasoline and Motor Oils
General Discussions
Motor Vehicle Inspection
Motorcycle ATV Repairs
Motorcycle Body Repair
Motorcycle Clutch Repair
Motorcycle Engine Repair
Motorcycle Repair
Motorcycle Seat Repair
Remote Control Cars
Steering and Suspension
The Bargin Bin
Traffic Ticket Help
Tricks of the Trade
Truck Repair
Truck Repair Advice
Truck Engine Repair
Truck Suspension Repair
Car Forum - Sitemap


Search for (options) Privacy