CHECK ENGINE LIGHT, You help fix = You are God

h0oligan

New Member

Jan 18, 2003

271

0

0

Oct 23, 2004

#1

• Oct 23, 2004

• #1

I put on a CAI on my 94 gt and now the check engine light comes on when a cruise at like 50/55mph at like 2500rpm. I checked it over and over for vacum leaks, none. I don't think I'm able to clock the MAF b/c of the shape of the flange, which i think allows it to be in only one position. I went to autozone to have the codes pulled; the reader said that there was no definition available (and we didn't try using the OBDII under the dash, it was the EEC Test.) I've tried it with and without the screen; no difference. I'm on my last straw, I don't want to have to bring it to ford and be ripped off. Isn't there someone here who can help me????

 

Michael Yount

Mustang Master

Apr 10, 2002

9,039

6

79

Charlotte, NC

Oct 23, 2004

#2

• Oct 23, 2004

• #2

Are you absolutely certain that 1) you plugged everything back in that you disconnected, and 2) that you're maf plug is making good electrical contact with the maf?

 

PNY PWR

New Member

Jul 23, 2004

522

0

0

Wichita, KS

Oct 23, 2004

#3

• Oct 23, 2004

• #3

Tried resetting the computer?

 

h0oligan

New Member

Jan 18, 2003

271

0

0

Oct 23, 2004

#4

• Oct 23, 2004

• #4

just checked the, everything looks good. Also, I've reset the cpu after almost every change I've made.

 

PNY PWR

New Member

Jul 23, 2004

522

0

0

Wichita, KS

Oct 23, 2004

#5

• Oct 23, 2004

• #5

figured you probably did, just like to start out simple

 

ponycar17

Founding Member

Nov 17, 2001

1,367

4

38

Upstate South Carolina

Oct 23, 2004

#6

• Oct 23, 2004

• #6

Well, cold air kits are going to cause MAF reading problems. They seem to put the majority of the air 90 degrees away from where the MAF sensor should be. With mine, I had habitual problems with the car shutting off at idle after surging like crazy because the MAF wasn't given the reading that it should have seen. This all went away when I bought my Pro-M MAF Tuner. I can adjust the idle voltage as well as the low-mid, high-mid, and high range voltages. And all of them are infinitely adjustable with a laptop. I would recommend a Pro-M optimizer if you dont want to go the expensive route with the MAF Tuner. Your problem is likely that your MAF is reading a voltage that is lower than expected... The optimizer or MAF Tuner should help...

Or, you could order a Pro-M meter that's tune for cold air... Those will compensate electrically for the air being detected at a lower voltage...

 

h0oligan

New Member

Jan 18, 2003

271

0

0

Oct 23, 2004

#7

• Oct 23, 2004

• #7

any suggestions where to get one? It's good to know there is an answer out there.

 

ponycar17

Founding Member

Nov 17, 2001

1,367

4

38

Upstate South Carolina

Oct 23, 2004

#8

• Oct 23, 2004

• #8

h0oligan said:

any suggestions where to get one? It's good to know there is an answer out there.

Click to expand...

This is what I have... It's a MAF Tuner system. Cool stuff...

http://pro-flow.com/Product pages/MAFtuner.htm

I had to buy it directly from Pro-Flow because it was too new for other vendors to carry. If you have a meter that's calibrated for a certain injector set, you can calibrate that meter for any injector size with this meter and software. It's nice, because I had a 30# meter for 30# injectors and I went to 24# injectors. The software set the MAF Tuner to the correct settings so that I could run the 24s no problem...

The optimizer can also be purchased from Pro-Flow directly...

http://pro-flow.com/Product pages/remote_optimizer.htm

In my opinion, the optimizer needs some sort of O2 sensor feedback so you know what affect your changes are actually having on the A/F ratio. But still, you can adjust idle air easily with the optimizer, so it will probably help your problem if it's related to the cold air kit.

Good luck!

 

h0oligan

New Member

Jan 18, 2003

271

0

0

Oct 23, 2004

#9

• Oct 23, 2004

• #9

Alright, so this is basically to adjust the engine manually like if it was carburated? You said that you think that it would probably need some kind of O2 sensor to really figure out what my A/F ratio looks like, how would i go about doing that? Is there a way to pull codes for that? If so, i would like to do that now.