I hooked my car up to my computer and used moates software and a customefis cable and got these #s do they look good or is something outa whack? This is from my 92 camaro RS 305 TPI with manuel tranny
these were taken at idle
eng spd-775
Map signal- 1.35
Throttle pos. volts- .53
manifold temp- 142
coolant temp- 189
spark advance would jump from 12-14-17
Knock- 1
Map pres. value- 34.49
Iac steps-0
02 mV- 433
blm cell-4
blm- 140
int value- 128
fine fuel - 128
injector pulse width- 1.79
a/f ratio- 14.26
idle target- 775
battery volts- 13.5

any help will be appreciated.

 

I don't your IAC counts are correct. Should be around 30 at idle.

 

Is that all that looks wrong?? Does that mean I need a new IAC??

 

The other numbers seem ok to me but I am no expert. Does your car idle ok? If your IAC is not working your idle will surge and not be able to hold a steady rpm. I don't understand how your IAC counts can be 0. Scan the data again and watch the counts and see what happens.

 

The car idles alright its not very steady and it does surge a bit but I can hear the Iac suckin Ill scan again and see if anything new comes up.

 

Low IAC counts could theoretically make your idle surge a bit since the ECM basically has little control of your idle. If those readings are right, what that means is your min air is set too high. and the IAC doesn;t need to open to maintain your 775 commanded idle speed.

 

I set the minimum idle air like two days ago. Ill do it again but damn this car is pissin me off, i just want it to run right, is that too much to ask,

yea right a thirdgen run right, ive had too many to think they can achive this task, but I will never stop trying.:lala:

 

Are you sure you set the min air right? If you did, then your idle with 0 IAC counts should be exactly what you set min air at. After all, thats exactly what setting min air is for, setting the closed IAC idle speed.

Other than that, i don't know what to tell you. It doesn't sound like you're describing a serious problem, just some minor driveability symptom. That kind of thing is almost impossible to troubleshoot without actually seeing the car.

Since you have a scan tool on it now, what you need to do is figure out what is happening while it is surging. Does the injector pulse width or timing jump around sigificantly, knock retard, O2 sensor get lazy, etc.

 

I acedentally pulled off a vaccum line the last time I was under the hood. I put it back on and it was all good. I have no Idea why the counts were so low on that I went and hoooked it up today and the counts were at like 40 for the IAC steps. but its all good now all I have to do is find the miss that never goes away. guess ill try another set of plugs.