reaching my wits end with this one (Page 2/2) cartercarbaficionado NOV 26, 09:15 PM quote Originally posted by Patrick: Whoever this "somebody" is, ignore any future Fiero advice from them. ironically I read it on a thread on this forum. Patrick NOV 26, 09:38 PM quote Originally posted by cartercarbaficionado: ironically I read it on a thread on this forum. Nevertheless, my advice still applies. Dukesterpro NOV 27, 03:46 PM Okay, lets slow down and take a breath before we go tearing any more components off the car. I just did up the top of my 2.8 so all this is fresh in my head. First thing I want you to do is get the ICM running right. Make sure you use thermal grease when you install it. Make sure the contacts on your connectors are clean (Higher resistances means high load across the ever fragile ICM.) Make sure your plugs are in good shape and gapped appropriately. Dont worry about the high idle or the fan until this is done. Period. Once that is done, start the engine, when it starts high idling block the intake of the throttle body. That baby should be sucking hard and when you palm closes off the port it that engine should stall almost immediately. If it doesn't, or sputters a bit before stopping, you have a vacuum leak. Usually when this happens it will be accompanied by a hiss since wherever the leak is will be trying to draw a ton of air. (I am shooting from the hip and guessing its either a cracked line, or the metal tube for the IAC that goes into the back of the throttle body.) The fierostore METAL line kit is worth every penny, I put them on my 2.8 cartercarbaficionado DEC 04, 08:57 AM quote Originally posted by Dukesterpro: Okay, lets slow down and take a breath before we go tearing any more components off the car. I just did up the top of my 2.8 so all this is fresh in my head. First thing I want you to do is get the ICM running right. Make sure you use thermal grease when you install it. Make sure the contacts on your connectors are clean (Higher resistances means high load across the ever fragile ICM.) Make sure your plugs are in good shape and gapped appropriately. Dont worry about the high idle or the fan until this is done. Period. Once that is done, start the engine, when it starts high idling block the intake of the throttle body. That baby should be sucking hard and when you palm closes off the port it that engine should stall almost immediately. If it doesn't, or sputters a bit before stopping, you have a vacuum leak. Usually when this happens it will be accompanied by a hiss since wherever the leak is will be trying to draw a ton of air. (I am shooting from the hip and guessing its either a cracked line, or the metal tube for the IAC that goes into the back of the throttle body.) The fierostore METAL line kit is worth every penny, I put them on my 2.8 gonna be regrounding the engine before doing any of that since the factory ground is no longer continous when we tried to start it the other day, and since someone's been using butt connectors on most of the connectors I'll be sautering solid connections there instead. I am suspect of the computer since a shift cable gasket has been bad for an unknown amount of time. note: we bought this for 5k and we were told "Oh yeah you can drive it across the country right now" and after it broke 5 times we got to drive 400 miles home. now to be fair to the guy we got it from a hose and a shift cable end breaking over and over were not his fault Dukesterpro DEC 04, 11:13 AM quote Originally posted by cartercarbaficionado: gonna be regrounding the engine before doing any of that since the factory ground is no longer continous when we tried to start it the other day, and since someone's been using butt connectors on most of the connectors I'll be sautering solid connections there instead. I am suspect of the computer since a shift cable gasket has been bad for an unknown amount of time. note: we bought this for 5k and we were told "Oh yeah you can drive it across the country right now" and after it broke 5 times we got to drive 400 miles home. now to be fair to the guy we got it from a hose and a shift cable end breaking over and over were not his fault Cleaning/repairing the grounds and soldering connections is good. Worrying about the computer is not. Don't overcomplicate your procedures. My 86 GT had no grommets between the firewall and the computer, the center carpet was wet and ruined when I pulled it out of the junk yard and the computer was perfect. Finish the grounds and other connections, they follow my instruction in the previous post. If you allow your mind to race and start replacing stuff that isnt bad this is going to get even more frustrating and expensive. You probably just have a vacuum leak. . . Additivewalnut DEC 04, 02:09 PM Absolutely check grounds. Had a very similar problem with my 2.8 ICM. Gave up on it and swapped in a 3800 but found I was missing my engine to body and body to frame grounds in the process. I already bought the parts so the engine still got swapped. It was annoying to see that I could've saved some time and money but just looking for grounds first though. cartercarbaficionado DEC 08, 01:56 AM quote Originally posted by Additivewalnut: Absolutely check grounds. Had a very similar problem with my 2.8 ICM. Gave up on it and swapped in a 3800 but found I was missing my engine to body and body to frame grounds in the process. I already bought the parts so the engine still got swapped. It was annoying to see that I could've saved some time and money but just looking for grounds first though. in that case this car has always been missing a ground and the only one looks like crap, it only has an engine to battery cable style ground, do time to run 5 different grounds to everything that draws major power and at least a good 00 gauge wire to the body cartercarbaficionado DEC 08, 01:59 AM quote Originally posted by Dukesterpro: Cleaning/repairing the grounds and soldering connections is good. Worrying about the computer is not. Don't overcomplicate your procedures. My 86 GT had no grommets between the firewall and the computer, the center carpet was wet and ruined when I pulled it out of the junk yard and the computer was perfect. Finish the grounds and other connections, they follow my instruction in the previous post. If you allow your mind to race and start replacing stuff that isnt bad this is going to get even more frustrating and expensive. You probably just have a vacuum leak. . . just gonna reground the engine since it smoke tested with no leaks for the vaccum so I'm pretty sure since it's only an issue when its warm it's the ecm attempting to learn or go into full closed loop and getting wonky **** since this car has never had at least one of its engine grounds