Low Budget
Member
- Joined
- Apr 10, 2002
Can someone please explain this to me? My IAC is not consistant even a little bit! I thought I had it reset and set correctly yesterday, and then I set the TPS and everything seemed good. I shut the car off and restarted it and it's all screwed up again. I HAD the IAC counts around 18 and the TPS was .42 with my idle at 750-800 rpm's in gear. After the restart, the IAC was at 10, but the engine wouldn't even stay running. It just let the rpm's fall off and never even raised the IAC counts. Today, I left the scanner hooked up and went for a 2 leg 100 mile ride. Each time I would come to a stop on the first (20 mile) leg the IAC wouldn't change and I would have to keep my foot in it to stay running. It wouldn't even try to save itself. I shut the car down for an hour. Then for the second leg, (obviously around 80 miles) I raised the minimum air enough to keep it running, but just barely. I also reset the TPS to .42. At times the engine would drop to 650 or so rpm's, and even then the IAC counts remained at -0-. It had changed to -0- when I raised the minimum air.
Here's my real question. Is the computer not telling the IAC to change, or is it telling it to change and the IAC isn't responding? If it's the latter, I know the IAC may just need cleaning and to have the plunger rezeroed. If the ECM's telling it to move, I don't understand why the numbers are not changing on the scanner. Is there no change in the numbers because the ECM needs a response from the IAC it's not getting? In other words, the ECM doesn't show what it's telling the IAC to do, it shows what the IAC IS doing? (What came first? The chicken or the egg?)
I hope someone is able to help me out here pretty quick. I'm going to check my mail at 11am est Sunday for the last time until Friday. (vacation) I'm taking this car and some tools with me. I hope to correct this problem while I'm away, but I won't have any access to you good people where I'm going.
Thanks for any info you can give. Jeff
Here's my real question. Is the computer not telling the IAC to change, or is it telling it to change and the IAC isn't responding? If it's the latter, I know the IAC may just need cleaning and to have the plunger rezeroed. If the ECM's telling it to move, I don't understand why the numbers are not changing on the scanner. Is there no change in the numbers because the ECM needs a response from the IAC it's not getting? In other words, the ECM doesn't show what it's telling the IAC to do, it shows what the IAC IS doing? (What came first? The chicken or the egg?)
I hope someone is able to help me out here pretty quick. I'm going to check my mail at 11am est Sunday for the last time until Friday. (vacation) I'm taking this car and some tools with me. I hope to correct this problem while I'm away, but I won't have any access to you good people where I'm going.
Thanks for any info you can give. Jeff