Okay the car was running somewhat fine up until yesterday when it took a complete crap on me and is not even driveable no more.

She doesnt idle at all anymore, the surge is crazy and now my rear header runner is glowing apple red and this can be seen middle of day. The front is not glowing.

I sprayed down whatever vac lines and sections I could access, with brake cleaner to test for leaks but couldnt find anything, but I'm not to sure how effective this would be, being I had to set my idle speeds to 2000+ rpm just to get it somewhat steady.

Do I need to just pull everything apart and replace all mani gaskets, o rings, etc.. or what cause I'm fed up now and ready to overhaul everything past the TB

My afr gauge reads 10-11 afrs but could this juast be from one injector (the front) and the rear injector actually be inop

I have an exhaust leak at the vband clamp on the turbo but thats not the culprit

BTW I have the following mods

KG parts single turbo setup
GM 3 bar MAP sensor....Would a improper size vac hose to the sensor casue this?
720/1680 inj w/resistors
Power FC w/datalogit & commander
High flow fuel pump & FPR
SS -6 fuel lines
Ign amp & upgraded wires
3" full exhaust

 

really need some input on this one...Aslo she's hard to start and the rear header glows from just an idle

 

maybe you blew the turbo ?

the manifold should not glow at idle

 

naw turbo is fine and either way, really dont see how a blown turbo could be the culprit for just the rear header runner glowing and the surging idle...Im thinking timing but both runners should be glowing so that leaves either rear primary injector or intake mani leak, or maybe something screwy going on with the pfc/map I dont fckn know...

 

What size hose should I be running to my 3 bar map sensor and also where should I be plumbing it at?

 

Did you compression test the motor? A stuck seal can make a runner glow. Could also be a leaking fuel injector, ignition, or timing issue. What were you doing when this happened?

 

No, honestly I want to rule everything else out first ign, inj, vac leaks, or something simply screwy with my map sensor...which I'm leaning towards to... I was adjusting my tps beforehand and put a new vac line on my map sensor then I went to start her up. While she was idling I was trying to lean her out a bit through the base map (base x inj) and then this...

 

I think you blew your rear rotor, and all that fuel is burning up in the manifold. Check the spark plugs and make sure you're pulling good vacuum. I had a nipple come off a hard line, and it resulted in unbearable surging.

Brake cleaner is probably the last thing you want to spray on your rubber vacuum lines.

 

the boost gauge reads between 9 to 10 inches at idle I disconnected the neg terminal and reset everything on the pfc. I loaded up my basemap and she started up fine but then idle rose to like 2300rpm and then it started surging and died....I'm going to pull the uim today and check the injectors

 

also I do have a very questionable lim gasket

 

When I blew my LIM gasket my idle hunted but wasn't all that bad. Certainly no red manifolds.

Also I think you want to be spraying carb cleaner. Brake fluid is nasty stuff.

 

Like Barban said, i think you blew the rear rotor and all yor fuel is burning in the rear exhaust runner. A friend of mine just blew is rear rotor and have the same symptome as you describe!

 

damn I'm in denial stuck at work right now but gonna pull the uim and check the primary rear injector..

 

Compression test the motor.....

 

^^ Agreed with RES. All the symptoms that you explained, he has given you the culprits that would cause it. If I were you , I would check the compression first, if it is good, then you've crossed the biggest hurdle first and the rest are minor details.

If it is blown, then you didnt wasted your time looking for ghosts., however, before you pull it down, you need to find out why it blew. Stuck injector, bad map, over boosting...etc.
Also..(more bad news) 99.99% of the time, if you have blown a motor, your turbo got the shrapnel from it. You might not can see it from outside.. but it's there..


Good luck.

 

That's really terrible vacuum at idle. Should pull 15-20inhg at 800rpm. You either have a massive vacuum leak(like an entirely gone vacuum line or the worst LIM gasket on earth), or you've popped the rear. Even if you're dumping fuel into the rear, you should be pulling better vacuum.

 

okay well I was able to pull theprimary injectors before it started pouring outside...any way I found 3 vac leaks one right after the tb next to where my map sensor is plumbed the other right above the omp injector and on onethe lim and to add to all that the rear upper o ring on the rear primary injector was severely pinched

 

gonna address these issues then test the injectors, put it all back and cross my fingers

 

This def explains the fuel smell I had in the engine bay and the sudden drop of fuel pressure whenever I turned the car off. Oh and just for the record the car has only seen boost on three occasions, since the build up and even then it was only brought up to 4 psi and was running hella rich...She has been sitting in my driveway for this very fact, trying to get it somewhat driveable, this is why I dont believe she's blown....

I'm thinking because of the pinched off leaky injector and vac leaks the pfc was retarding my timing and or either so much fuels was spilling into the chambers that it was burning in the exhaust runners.

It smoked and smelled of unburnt fuel anytime I'd have it running in the driveway, so bad that it would water your eyes...but like I said I'm going to fix everything, probe and leak test the injectors, then put everything back together and hope for the best...

and at least that way Ill have everything ruled out and have a definate culprit, if its indeed blown.

 

If you reset the PFC, you're running a 3 bar MAP sensor on a tuning map that's meant for a 2 bar sensor.