rcturgeon

well guys turns out it was the CTS thanks for all your help

okay so i did some tests with a digital ohmeter on both the CTS and the MAT sensor and buth of them came back infiniity even with the engine running at normal temperature, ill try replacing these but it will take a while to get the parts in up here so ill tell you all how it goes thanks for your help guys

well 87' i know what your talking about and ya the screw and lock nut looks as one because its all rusted up.. but the actually moves when the truck is started and shut off. pushes out on the throttle when its shut off and just after it starts it will pull back in .. but when i unplugged it before it would idle way higher i believe.. actually started easier when we unplugged it but like i said before it would just idle really high after it started.. I'm not sure if its supposed to be a progressive retraction when it starts or soon as it starts just pull all the way back almost immidiatly.. like i said.. I'm new at alot of this.. but i learn fast, read alot, and in no way discredit anyone with any information

good thought 87' but the idle speed is all done automatically and it can't be adjusted, and once its warm the idle is where its supposed to be, I'm not an expert by any means and i know for sure everyone else here is probably more knowledgable than i dream to be. ill look at the suggestions from you coma as for the MAP i checked the ground voltage and it was between the recomonnded 4.5-5 and when it was idling and warm i checked it again while it was idling and it was lower somewhere near 2 or something and it flucuated with the RPM changes .. and when i unplug it to run it in 'high speed density' but it would stumble even quicker and when i played with the throttle it was a hard job to keep it going at all okay i just looked up some numbers and a test for the CTS so ill do that inbetween classes tomorrow and find out if thats it thanks for getting back to me guys

I got an 88' 2.5l TBI (sportruck if it matters) about a year and a half ago its now got 213,000KM on it and i worked on it for a while to get it road worthy, just about everything is running great and I only have one real issue left and its getting it to start and idle when its cold. I've read posts from others for a long way back, but alas, i still do not have a solution. so the breakdown is: - start truck and after about 2 seconds it dies - i can play with the gas pedal for a minute or so (longer if its really cold out) and it will run fine after it warms up - once its warmed up for a bit it seems to run great as far as i can tell - ive got new plugs, plug wires are great, the distributor looks good, the coil is good, gas flow and pressure seem fine because its fine when its warm, Ive gone over vaccum lines countless times to find leaks and even used propane to blow over all the lines while its idleing to find leaks, MAP sensor is tested good, I looked at the EGR valve and checked the mobility of the diaphram and if i hold the diaphram in while its warm it stumbles and runs rough I'm sure i've done more but i can't remember at the moment -the only thing i havent done is checked the compression but I'm not sure if that would be affecting it in this way even if it was low, but i suspect its good - ive read tons of posts and service manual tips and just about everythign else but i stil can't find something that works. If there are any other symptoms that will help diagnose please ask, I'm getting desperate now