|
|
|
93' K5 Blazer 5.7 TBI Cold start flooding issue
|
|
|
| |
|
|
SuncrestSniper
User
Sep 29, 2012, 7:41 PM
Post #51 of 66
(2603 views)
|
Re: 93' K5 Blazer 5.7 TBI Cold start flooding issue
|
|
|
Dry at the tank and filter and now the TB. Where else should I look. I'm at 11the psi running and 11 at start up. Still it drops to zero when reg kicks out or shut off. Regulator is a complete new one not a rebuild. Is it possible that the Borg Warner stuff is or could be junk from the get go or are there other connections I need to look at? Is there a schematic of the fuel lines?
SS
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Sep 29, 2012, 7:43 PM
Post #52 of 66
(2600 views)
|
|
Re: 93' K5 Blazer 5.7 TBI Cold start flooding issue
|
|
|
The rest pressure is going somewhere. It is supposed to hold when the key is shut off and it's not.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
|
|
| |
|
|
SuncrestSniper
User
Sep 29, 2012, 7:58 PM
Post #53 of 66
(2594 views)
|
|
Re: 93' K5 Blazer 5.7 TBI Cold start flooding issue
|
|
|
I realize that from what I have read. Which. Is leads me to think that Borg Warner reg is Sh!t even though it's new. Already had a Sh!t cystic sensor from them.
Any suggestions?
SS
|
|
| |
|
|
SuncrestSniper
User
Sep 30, 2012, 10:52 AM
Post #54 of 66
(2583 views)
|
|
Re: 93' K5 Blazer 5.7 TBI Cold start flooding issue
|
|
|
OK cold morning start. Primes to 11 PSI drops off when relay kicks out immediately. It just flat drops. When cranking it's @ 7 to 9 PSI. So I did a test and pinched off the return line, low and behold she cranks right up to 14 PSI and holds. And the truck finally started. Once running it holds at @ 11 PSI with a slight drop to 10 if you flip the throttle a bit. I'm seriously thinking that Borg Warner Regulator assembly I got is junk.
I can't get the system to leak down pressure with the return line pinched. With it open it drops right off and I'm pinching it off back at the Tank between the frame and tank it's self.
SS
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Sep 30, 2012, 11:19 AM
Post #55 of 66
(2576 views)
|
|
Re: 93' K5 Blazer 5.7 TBI Cold start flooding issue
|
|
|
Yep, that's the regulator.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
|
|
| |
|
|
SuncrestSniper
User
Sep 30, 2012, 11:40 AM
Post #56 of 66
(2567 views)
|
|
Re: 93' K5 Blazer 5.7 TBI Cold start flooding issue
|
|
|
Quick question on the regulator I put in. The allen screw in the bottom is not soldered off. Do these things need to be set or adjusted or is it simply a matter off it not working like it's supposed to?
SS
|
|
| |
|
|
SuncrestSniper
User
Sep 30, 2012, 12:34 PM
Post #57 of 66
(2566 views)
|
|
Re: 93' K5 Blazer 5.7 TBI Cold start flooding issue
|
|
|
Well i yanked off the Regulator assembly and sent it into town with the wife. There swapping it out with another and we'll try that when she gets back in 45 minutes or so.
SS
|
|
| |
|
|
SuncrestSniper
User
Sep 30, 2012, 2:21 PM
Post #58 of 66
(2547 views)
|
|
Re: 93' K5 Blazer 5.7 TBI Cold start flooding issue
|
|
|
Ok I noticed that the first Regulator i got had the spring base ring at the bottom of the can. It came in just the box no bag. The one I just got was in a bag and the spring base is about 1/8" off the bottom of the can looking like what I have seen in similar pictures of these units. I now get 10.5 PSI at key on only but the gauge is still dropping off not fast like the other regulator but a steady drop down to zero. Running PSI is @ 10.5 as well. It's got me thinking these Borg Warner Regulators are just junk period and can't hold any pressure what so ever. My last option I guess is to get a GM part and take the BWD one back and cram it up someones ass.
SS
|
|
| |
|
|
SuncrestSniper
User
Sep 30, 2012, 3:49 PM
Post #59 of 66
(2541 views)
|
|
Re: 93' K5 Blazer 5.7 TBI Cold start flooding issue
|
|
|
I decided to do a little test. I disconnected the return line and plugged the outlet fitting on the TB turned the key on and it built and it held pressure at @ 10 PSI. Cracked the plug slowly and watched the gauge along with the fuel run out and drop. These BWD aftermarket regulators are indeed junk. I'll hit the local chevy dealer on Monday at lunch and grab the real deal. I'm letting everyone know that the guy at the parts store didn't even seem surprised when I called him with the findings. I'll get the $80.00 refunded from them and it's going towards the AC Delco part and I'll never uses another Borg Warner part again. What a pain in ass this whole thing has been.
SS
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Oct 1, 2012, 5:01 AM
Post #60 of 66
(2531 views)
|
|
Re: 93' K5 Blazer 5.7 TBI Cold start flooding issue
|
|
|
If nothing else you've had quite a ride with this. Do check the GM part that in fact it is a GM part. For a 1993 they may just get something local to them also unless you specify. Couldn't possibly be certain of antics of any of them,
T
|
|
| |
|
|
SuncrestSniper
User
Oct 3, 2012, 4:15 PM
Post #61 of 66
(2513 views)
|
|
Re: 93' K5 Blazer 5.7 TBI Cold start flooding issue
|
|
|
Well it's back to normal. The coil eneded up being bad. Zero reading when 40 degrees or colder on the OHM meter heat it up to @ 70 degrees and it was just barely in spec. So No more MSD coils for me if they are only good for a year at best. Put the new coil on and the truck has run fine for the past 3 days. All the new parts were not a total waste as we did find the battery bad, alternator was on it's way out, fuel pressure was low so the new pump was in need. Filter was junk. Cap and rotor were shot. IAC was struggling. A few side notes to keep in mind The fuel pressure regulators that are sold now have a bleed off built into the diaphragms. They release the pressure slowly. Also coils don't always go bad when hot. my case is an odd one but they do have cold issues as well.
I'd like to thank everyone that helped with this issue and hope that if in the future anyone else runs into a scenario like this that they get the same help but also get a possible solution as to what the problem could be before they dump a crap ton of money into the vehicle.
Thanks again gang and enjoy the rest of the week!!
SS
Jason
|
|
| |
|
| | |
|
|
SuncrestSniper
User
Oct 3, 2012, 5:19 PM
Post #63 of 66
(2497 views)
|
|
Re: 93' K5 Blazer 5.7 TBI Cold start flooding issue
|
|
|
It's in the design. The Diaphragms have a bleeder in them. We took three different ones apart an all have the same little spring loaded type valve in them. Pressure builds up and if it doesn't go anywhere it appears it pops and bleeds down. I'm running at 12 PSI now at start up and under load. No leaks in the fuel system what so ever and even though the pressure drops to zero the truck fires right up. Pressure build time is a matter of a second or two. We've been hitting the 30's for lows and it fires right up. My mechanic said he had never seen the diaphragms like this before either. Either way I don't care the truck runs, I'm happy and it's time to move on.
SS
|
|
| |
|
|
papadwight
New User
Oct 5, 2012, 2:47 AM
Post #64 of 66
(2476 views)
|
|
Re: 93' K5 Blazer 5.7 TBI Cold start flooding issue
|
|
|
there are 3 sensors that would affect cold start. Map which is your load on the engine, mat which is the manafold temp senser, Coolant temp senser make sure these are reading the real temp. The computer is a box it dont think before closed loop its a programed warm up cycle its getting wrong info from a sensor or something it does not monitor is affecting it. The o2 is a after warm problem it don't even use it at cold start, It may keep it in cold loop but not flood cold.
|
|
| |
|
|
nickwarner
Veteran
/ Moderator
Oct 5, 2012, 3:40 AM
Post #65 of 66
(2472 views)
|
|
Re: 93' K5 Blazer 5.7 TBI Cold start flooding issue
|
|
|
Papadwight, he fixed this problem already. It says it clearly in his last post. He also knows what sensors are and how they work, as do the rest of us. Leave it be.
|
|
| |
|
|
Discretesignals
Ultimate Carjunky
/ Moderator
Oct 5, 2012, 4:49 AM
Post #66 of 66
(2464 views)
|
|
Re: 93' K5 Blazer 5.7 TBI Cold start flooding issue
|
|
|
Glad to see you got it figured out. Thanks for the follow up on your problem as this may help others in the future.
Closing topic as solved can be reopened by request from the OP.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
|
|
| |
|
Auto Repair Home
SEARCH
WHO'S 
LOG 
Car stalling problem
2018 Kia soul. Knocking while accelerating.
p119f22 ‘Deterioration of the engine oil’ - 2017 Peugeot Boxer Euro 6 2.0 Blue HDi
