After Injector, and MAF Meter upgrade, car won't idle.

BlackFox5.0

Founding Member

Aug 7, 2000

3,514

1

0

Massachusetts

Feb 21, 2004

#1

• Feb 21, 2004

• #1

It idled fine when i first started it, then I took it for a test drive, came back and it wouldn't idle....

I put in a Pro-M 75mm bullet, and 24# injectors the MAF is calibrated for the 24# too.

What could be wrong? I thought the computer might be trying to adjust, so I unplugged the battery to reset the computer, as of right now it's still unplugged, I'm not exactly sure how long it takes, but I am gogin to wait at least 30 mins.

Anyone have any ideas?

 

mustangdaren

Founding Member

Apr 21, 2002

605

0

0

Hildebran, North Carolina

Feb 21, 2004

#2

• Feb 21, 2004

• #2

I figure you had to remove your upper to access the injector rail on the drivers side. Check for vacuum leaks, hose connections and that the EGR and IAC sensors are plugged up. Also check for a good connection at the MAF and if you are not using the mounting bracket for the MAF make sure that it is mounted with the sensor directly on top. I have heard of some people using cold air kits that had to clock their MAF. This is when the MAF is rotated so that the sample tube is in a different location in the air stream. I don't believe I have heard of any problems with a naturally aspirated car but it is common on a supercharged car.

 

mustangdaren

Founding Member

Apr 21, 2002

605

0

0

Hildebran, North Carolina

Feb 21, 2004

#3

• Feb 21, 2004

• #3

Also check your TPS voltage and throttle position screw, things can get bumped when removing the upper intake. One turn of the throttle screw and .10 volt made a world of differece in the idle of my car. When I installed my Cartech upper mine was 1.04 volts and I adjusted it to .986 volts and it went from not wanting to stay cranked and pig rich at idle to idling perfect. (that was after I pulled most of my hair out checking everything else) I would have never thought it would have been that.

 

BlackFox5.0

Founding Member

Aug 7, 2000

3,514

1

0

Massachusetts

Feb 21, 2004

#4

• Feb 21, 2004

• #4

I didn't touch the TPS at all. It could be a vacuum leak, but I think i got all the hoses back on....

 

1

1BAD89GT

New Member

Jan 2, 2004

87

0

0

Oklahoma

Feb 21, 2004

#5

• Feb 21, 2004

• #5

Did you Buy the Injectors New? Sounds like You have one leaking Bad or stuck open,I had one do that to me before primed the system and few times.then pulled the plugs and had fuel run out of the cylinder with the Bad injector.

 

BlackFox5.0

Founding Member

Aug 7, 2000

3,514

1

0

Massachusetts

Feb 21, 2004

#6

• Feb 21, 2004

• #6

They are used, but are low mileage I think. It runs fine when I drive it...it just doesn't idle.

I'm going to go plug in the battery now, and see what happens.

 

BlackFox5.0

Founding Member

Aug 7, 2000

3,514

1

0

Massachusetts

Feb 21, 2004

#7

• Feb 21, 2004

• #7

Ok, I guess thats what the problem was because it's running fine, I took it for a normal drive, and came back, and idled just fine. The computer just had to be reset

 

S

StonysGT

Founding Member

Jun 10, 2002

220

0

0

winamac, Indiana

Feb 21, 2004

#8

• Feb 21, 2004

• #8

some times computers such huh