Ok here's my situation, did a single build over the winter, got the car running decent with all the new mods. BDC came out to tune me and no matter how much fuel he threw at the car it would go lean into boost. Well 2 months later I found my problem, I had a BAD leak at the LIM. I removed the LIM and to my horror found that the old paper gasket was almost non existent and crumble to pieces on the garage floor, so basically there was no gasket. I put a new metal gasket back on, put everything back together and now the car runs like total ****!! I adjusted the idle screw since the intake leak was now fixed, but the car sounds like a damn lawn mower and I am only getting 8-9 for vacuum on the boost gauge at like 1000 rpms. While the car is running I can pull any vacuum line off and the vacuum doesn't go down at all. Someone said to check because I might have a blown motor but I dont understand how it could run great with intake leak, take the LIM off put a new gasket in, startup and now it's blown...

I know the logical thing to do is a compression check so I guess that's the next step.

The car ran like this when I changed out the map sensor 6 months ago and didn't have the right settings in the dataloggit and also ran like this 2 years ago when I fouled the plugs...checked the settings of the map sensor, still good and changed the plugs...no difference.


Alittle info about the car...
reman motor with 5k on the clock
850 primaries, 1680 secondaries, aeromotive fpr, base fuel pressure at 40...

Hope someone can help me!

 

bump for some help please...

pulled each spark plug wire and was getting good spark to each spark plug... I also noticed a possible exhaust leak where the turbo connects to the exhaust manifold

 

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could you have swapped the fuel temp sensor with water temp sensor? thats what happened to me after my rebuild. just sharing.

 

Nope, the engine was rebuilt prior to me purchasing the car, came with the receipt and everything. The car ran like a dream with my non-sequential setup but I wanted more power, over the winter I purchased $15k worth of parts which included performance engine parts to rims, tires, struts, springs, etc...the works basically. When I put the new turbo on I didn't pull the motor and like I mentioned it ran fine but when on the dyno for tuning it would go lean into boost no matter how much fuel we threw at it. I put a smoke machine on the car and it would come billowing out of the LIM where the gasket is. Last weekend I pulled the gasket out put a new one on and there is no longer a leak but now the car runs like doo doo! I don't see how it could run great then fix the leak and no it has symptoms of a blown motor...

 

maybe its running insanely rich from all the fuel u threw at it before you fixed the gasket

 

That's what I was thinking, so BDC sent me a new base map and still had no effect...I guess I wont really know until I do a compression test, but during the meantime if any GURUS out there can chime in I'd appreciate it!

 

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Check a/f with a wide band

 

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man this sucks I cant figure out what's wrong