lancer013

Finally it runs still need to do some work to it still it was the ecm still waiting on spark controller

Buccaneer

WOW! You have more than likely multiple issues. The number one suspect of a high idle is a vacuum leak, but before I say anything more...Do you have a GM Service Manual? If not, get one. It is an absolute MUST with these cars to maintain them.

OK, now for the rundown. Check ALL the top plate bolts for tightness, it's a weak point for CFI. Next check the TB bolts, same thing. Next is the IAC's, are they working (cycling)? The IAC controls the idle and is a controlled vacuum leak.

You said you moved the dizzy, did you disconnect the EST wire before doing that? If not, the ECM was controlling the timing and not you moving the dizzy. You may want to recheck your timing now.

Do you or did you have a CEL? If so, what were the codes? Why did you replace the MAP sensor, just wondering? Hope some of this helps, so take one system at a time and not shotgun parts into it.

lancer013

Sorry guys update was ecm once i plugged it in was a whole new car was running good for a while now having issues again

billschroeder5842

This is really the best way to identify your issues. Please check your codes and report back!

lancer013

I have maf low goes on and off then tps sensor to low cannot idk by itself under 1k

terry82

a 1982 corvette has a map sensor.http://www.ehow.com/how_4478865_trou...ap-sensor.html

lancer013

Yes i know but if u check my other thread with video my code reader call in maf/map

lancer013

terry82

so did you check the sensor?

Buccaneer

OK, gotta ask...Do you have a GM Service Manual? If not, get one. ALL the troubleshooting you need to do is in there. It's a HUGE MUST have on these cars.

The MAP sensor probably isn't bad, but you may have either a Ground, Short or Open in CKT 432 OR Ground, Short or Open in CKT 416 and then the ECM is probably bad if the above CKTs are good.

All you need is a manual and a meter to figure out what is bad.

lancer013

I have only Hanes yes i bought a new one still no change what is ckt 416&432 ecm is brand new only a month old

lancer013

Is there a way to adjust pressure for map

billschroeder5842

Nope. The MAP sensor is... a sensor. It measures the pressure from the manifold.

Question as to why you want to "adjust" the pressure?

terry82

if the map sensor has been changed and you are still getting a bad reading then you have to look at what is causing the bad sensor reading.I would check first were is your map sensor connected and do you have a vac leak.

lancer013

No vac leaks on code reader says its low i blocked main port and check for leaks none

lancer013

terry82

pull plugs .see what they look like .then check that all wires ,are in the right place.

lancer013

Running rich wires in place ive changed 02 sensor new plugs and wires new map coolant temp ecm ignator

terry82

how many miles?is it back fireing on just one bank.?you might need to check the cam.

lancer013

83k it was running perfectly fine like 1month ago but tire popped then when i started back up it was running weird again if not im really considering coverting to carb soon