i finish my car today and i started it and the car start for 10 to 30 sec and die but doesnt unless you keep hitting the gas and start missfiring and now it have a loud noise that i dont know where it come but i dont think is the turbo. the turbo is getting oil. my A/F gauge reads betwen rich and stoich but when it dies goes too lean and sometime when i tap the gas it goes to lean. i havent drove it and i dont think im going too im worry about and i hope is theres a fix to it. any sugestion or gess of what could be? my setup is in my signature. thanks

 

1. the A/F gauge won't give an acurate reading until the o2 sensor is warmed up to at least 600 F.

2. How does it run for the first 10-30 seconds that is runs by itself.

Vaccum leak, AFM, Compression???, Running really rich...

More info?

 

Check your timing. Your crank angle sensor might be installed incorrect.

 

the first 10-30 sec runs by it self and idle about 1200rpm
but after that i have to give gas or dies. and i start giving gas and it start missfiring alot. and my A/F gauge said stoich- rich and i look back to the muffler menwhile i rev it and is like rich. only come like black smoke. i dont see any white or blue smoke. but like i said sometime my meter sometime read lean and when first i started it it foul my spark plug about 5 times and the it started to run the 10-30 sec running fine and die. by the way too, i have four gslse injectors but only two are working with the gslse computer, and distributor with 0 degree leading and i think 10 degree trailing and is not advancing. and i have the intercooler in the car but i didnt have enought pipe to finish so i too some PVC pipe and i skip the intercooler and send it strait to the manifold. does that will cause problem too? another thing the last time i try to keep it running, it make a loud noise, like it was locking or something and i check the turbo and it was ok. and i dont know. i hope is not a apex seal or something in the engine. and another thing how you can check if the BOV works? i think mine dont work but anyway it wasnt making boost. i hope theres a fix to it. i dont want to buy an engine now. thanks

 

well it doesnt sound like is locking but it make a loud skwel and i shut it of and didnt started after that.

 

what year AFM are you using? Also, what TPS?

 

most of the sensor is stock gslse sensor and the AFM, O2 sensor too, the only 2 sensor that i change was the air temp sensor that the original one broke and im using a 88 turbo II one and the TPS that is from a 88 turbo II.

 

im pretty sure its a vaccum leak...mine did the same thing when i cracked my lower intake manifold. you should check every vaccum hose 3 times to to be sure

 

im going to check that today and do some other things too .

 

well i think i found the problem. the the gasket of the lower manifold to the engine didnt seal at all by the middle plate. why because there a mark of the exhaust port there, im still searching it looked like every thing else is ok. i hope is only that.