Thread: 350 tbi problems

Tweet

so i have a 1987 350 tbi i am running straight pipe out of stock manifolds the motor is completely stock except for a msd coil and wires
when its idling it dies off stutters and then runs fine repeat...then when i step on the gas it will stutter the pick up and do ok
it just doesnt make power and at high rpm it will stutter and die till it slows down i just want to get to the bottom of it...
the motor is completely rebuilt and everthing is new some sensors were reused...but the truck it came out of ran perfectly

first thing pull the codes .....ted

there arent any codes check engine light does not come on
any other ideas

denny is right about the check eng light but have you gone back and checked all basics like timing don't forget the magic number whats that well I'll tell you it's 18436572 but don't tell anybody that's our little secret...ted

isn't that a brown connector????

As if in---do you have the wiring harness from the vehicle the engine was in????

yes the light turns on when the key comes on the timing is right
i know that everthing is set up right i just cant figure out why it dies off at idle...

sounds like it could be most anything I'd pull the fuel filter and check that may even be the fuel pump.there are somthings on these that even knowing the code dosen't help.

well the fuel filter is good i checked
the tps is brand new and the voltage is good egr valve is working
i dont know about the thermostat isnt 195 pretty hot???
what could be the consequences of to low or high of a thermostat could that be my problem????

ta know I would start suspecting the msd coils and wires...just a thought.....ted

thank you the temp sensor is in the stock position and the o2 is on the manifoldwhere it was when it was in the truck
my temp sensor could be bad???didnt replace that but i didnt know that that could cause such a problem...

Possible problems with temp sensors---

wrong type----two wire or single wire

Teflon tape on threads insulating it from ground

i did use teflon that could be my problem???
i will check that tomorrow
what about my idle air sensor do i have one and if so what would that do if it was bad????
my temperature sensor is a two wire one does teflon still affect it???

could it be my air filter?????

did you jump start/charger start your rig at one point? This in itself or a power spike could have taken out your ecm. you might consider dumping the oem ecm and going aftermarket like megasquirt or one of the high dollar ones.

mrtater