Even MORE problems with my new Mustang

lilgreenstang · March 27th, 2008, 05:53 PM

After fixing the missing and sputtering problem my '92 2.3 had by replacing the injectors, now it has a terrible idle problem which started right before the injectors were replaced and now is gradually getting worse. The "Check Engine" light pops on and off every time I drive the car, and when I come to a stop, the RPM's will drop to about 500 and the car almost dies and then they kick back up to about 900-1000 RPMs and the light goes off and the car is fine. It does this EVERY time I drive it now, and it's gradually getting worse. Today the light stayed on for about ten minutes, and I stopped and let it idle (while I was looking at the price on a 5.0 Mustang, haha) and the car was just struggling to keep itself running. Then I got in the car, put it in gear, and drove off and the light turned off and the car started running fine again. Only a couple minutes later the light came back on and the car started lightly jerking at about 75 MPH. I have no idea in the world what this is. Can any of you guys help me?

breakout831 · March 27th, 2008, 05:55 PM

change the plugs and wires

lilgreenstang · March 27th, 2008, 06:03 PM

Originally Posted by breakout831

change the plugs and wires

They are brand new plugs and wires. There is no way in hell plugs and wires needing replaced will make a car run the way mine is.

04DSGV6 · March 27th, 2008, 07:34 PM

is your IAC clean?

lilgreenstang · March 28th, 2008, 04:55 PM

Originally Posted by 04DSGV6

is your IAC clean?

I already checked the IAC. It's fine. I ran a code scan on it and found out that the mass airflow sensor was messing up. So I cleaned it and it seems to be working...so let's just hope that solved the problem.

MSO · March 29th, 2008, 11:08 AM

yep a clogged air filter will screw ur idle up

gotta keep it clean man lol

87merkur · March 30th, 2008, 01:36 AM

could be ur 02 sensor or a plugged cadilac converter? assuming u have them?

or a vaccume leak?

MSO · March 30th, 2008, 10:38 AM

gasket leak would do it too

vfast · March 30th, 2008, 02:03 PM

so would a plugged egr valve

lilgreenstang · April 4th, 2008, 11:18 PM

Well, I actually solved the extremely low idle problem. The rubber boot didn't seal on all the way on the underside of my intake elbow. Yeah, I'm a dumbass for not catching that. But the car is still surging under throttle and the "Check Engine" light goes on and off all the time. And I've also noticed that when I'm giving it light throttle, the car sounds like it's missing. I switched the MAF sensor from my other 2.3 and it didn't help, so it wasn't that. I am either thinking crankshaft sensor, bad O2 sensor, or clogged catalytic converter. I currently have a brand new exhaust system on my other car, which is going to be switched to my current one, but I haven't had the time to install it. But this car is getting absolutely ridiculous with its problems. I've spent WAY more money on this car trying to fix this problem than I had intended to.

March 27th, 2008, 05:53 PM	#1
lilgreenstang Newbie 1992 Ford Mustang LX 2.3 18 sec ...yeah it's pathetic Join Date: Mar 2008 Location: Redneckville, IL Posts: 44	Even MORE problems with my new Mustang After fixing the missing and sputtering problem my '92 2.3 had by replacing the injectors, now it has a terrible idle problem which started right before the injectors were replaced and now is gradually getting worse. The "Check Engine" light pops on and off every time I drive the car, and when I come to a stop, the RPM's will drop to about 500 and the car almost dies and then they kick back up to about 900-1000 RPMs and the light goes off and the car is fine. It does this EVERY time I drive it now, and it's gradually getting worse. Today the light stayed on for about ten minutes, and I stopped and let it idle (while I was looking at the price on a 5.0 Mustang, haha) and the car was just struggling to keep itself running. Then I got in the car, put it in gear, and drove off and the light turned off and the car started running fine again. Only a couple minutes later the light came back on and the car started lightly jerking at about 75 MPH. I have no idea in the world what this is. Can any of you guys help me? __________________ ]1992 Emerald Green 2.3L Hatchback My current modifications include: T5 swap, 17x9 Cobra R wheels, Tint, clear headlights, Custom CAI, MAC strut brace, K&N filter, EGR delete, and Magnaflow exhaust.

March 29th, 2008, 11:08 AM	#6
MSO おたく Join Date: Jul 2006 Location: アメリカ Posts: 5,915	yep a clogged air filter will screw ur idle up gotta keep it clean man lol __________________ MM Counter-Strike Club: Co-Founder/Group: Officer Dean MSO

March 30th, 2008, 10:38 AM	#8
MSO おたく Join Date: Jul 2006 Location: アメリカ Posts: 5,915	gasket leak would do it too __________________ MM Counter-Strike Club: Co-Founder/Group: Officer Dean MSO

March 30th, 2008, 02:03 PM	#9
vfast Enthusiast Join Date: Aug 2005 Location: @ Fast Trak Enterprises Posts: 960	so would a plugged egr valve __________________ EVERYONE IS ENTITLED TO MY OPINION 6'ers are for kids 1965 chevelle SS 421 sbc 6 speed, 3.90 gears,alum d-shaft, brodix heads,roller cam,925 AED carb...grocery getter

April 4th, 2008, 11:18 PM	#10
lilgreenstang Newbie 1992 Ford Mustang LX 2.3 18 sec ...yeah it's pathetic Join Date: Mar 2008 Location: Redneckville, IL Posts: 44	Well, I actually solved the extremely low idle problem. The rubber boot didn't seal on all the way on the underside of my intake elbow. Yeah, I'm a dumbass for not catching that. But the car is still surging under throttle and the "Check Engine" light goes on and off all the time. And I've also noticed that when I'm giving it light throttle, the car sounds like it's missing. I switched the MAF sensor from my other 2.3 and it didn't help, so it wasn't that. I am either thinking crankshaft sensor, bad O2 sensor, or clogged catalytic converter. I currently have a brand new exhaust system on my other car, which is going to be switched to my current one, but I haven't had the time to install it. But this car is getting absolutely ridiculous with its problems. I've spent WAY more money on this car trying to fix this problem than I had intended to. __________________ ]1992 Emerald Green 2.3L Hatchback My current modifications include: T5 swap, 17x9 Cobra R wheels, Tint, clear headlights, Custom CAI, MAC strut brace, K&N filter, EGR delete, and Magnaflow exhaust.

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March 27th, 2008, 05:55 PM	#2
breakout831 Hardcore Enthusiast 2006 Nissan 350Z Join Date: Dec 2006 Location: Central Florida Posts: 1,096	change the plugs and wires

March 27th, 2008, 07:34 PM	#4
04DSGV6 Enthusiast 2004 Mustang V6 Join Date: Oct 2007 Location: Chicago,IL Posts: 535	is your IAC clean?

March 30th, 2008, 01:36 AM	#7
87merkur Newbie Join Date: Sep 2007 Posts: 44	could be ur 02 sensor or a plugged cadilac converter? assuming u have them? or a vaccume leak?

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