henry172

iTrader: (2)

Can a MAP sensor cause problems at idle and not cause a SES light to show? I have been having a problem at idle for a long time now; I even rebuilt the entire motor and installed a ltcc ignition with new ignition parts. I have double checked the ignition and fuel system, but I can not find any thing wrong. The Idle is rough and tries to fix it self but surges up and down. I am thinking I might have a problem with the MAP or some other sensor. If I can not find the issue soon I am going to install eficonnections 24x ignition and have the car d=tuned by CMS.

shbox

Use a scan tool for diagnosis.

henry172

iTrader: (2)

^ That is my problem I do not have the correct scan tool like autotap.

Sc0tt30

iTrader: (6)

I would find out what the issue is first before i install a 24x conversion on it. Do you at least know what code the SES light is showing?

shbox

You can't troubleshoot modern cars without some kind of diagnostic equipment.

ZFreie

If he has a laptop, couldn't he order a usb to obd2 cable and download a free scanning program? I do this with my car and it works awesome. Would guess that its the same for obd2 cars.

.02

shbox

OBD-II stuff generally is not free.

ZFreie

Ah, I was un-aware! good to know. I've been shbox'ed again! lol

henry172

iTrader: (2)

Here is what I did I installed a new map and the car is running better at idle but something still seemed off. So I started to move the wires on the injector plugs around and when I got to cylinder number 2 the motor surged up and down. After this I went into the car and noticed the SES light was on and it was not on when I started the car; I read the code and found it was as injector circuit malfunction. I think the number 2 injector might be causing a problem so I am going to go ahead and solder in a new injector plug from a second harness I have. I hope that fixes everything; I have been fighting with this car for too long. The map sensor did seem to help because the car is not stalling out completely like it was. I really should go ahead and order autotap so I don't have to take the shotgun approach any more.