Hi I'm new to forum, I have a issue that has been talked about alot but still stumped. I have a 1994 gt 5.0, I recently put a e303 cam in, trick flo upper and lower intake, 75mm bbk throttle body, and deleted smog pump. The issue is when the car is cold everything works perfect, once it reaches normal temperature it has a problem idling down during shifts the rpms just hang there for about 3 seconds then finally falls. I replaced the iac but nothing, if I unhook the iac the car runs like it should, but once I shut if off I have to hook the iac back up to start it. I've also cleaned the mass air but haven't replaced it yet. I read that there is no way to adjust the tps on the 94s so I'm at a loss here. Also checked all vacuum lines and made sure there was no leaks in intake gaskets.
1994 5.0 Hanging Rpm
- Thread starter Kfh660r
- Start date
You guys with idle/stall problems could save a lot of time chasing your tails if you would go through the Surging Idle Checklist. Over 50 different people contributed information to it. The first two posts have all the fixes, and steps through the how to find and fix your idle problems without spending a lot of time and money. It includes how to dump the computer codes quickly and simply as one of the first steps. I continue to update it as more people post fixes or ask questions. You can post questions to that sticky and have your name and idle problem recognized. The guys with original problems and fixes get their posts added to the main fix. 
It's free, I don't get anything for the use of it except knowing I helped a fellow Mustang enthusiast with his car. At last check, it had more than 200,000 hits, which indicates it does help fix idle problems quickly and inexpensively.
It's free, I don't get anything for the use of it except knowing I helped a fellow Mustang enthusiast with his car. At last check, it had more than 200,000 hits, which indicates it does help fix idle problems quickly and inexpensively.
Similar threads
