|
|
Post by bonesgt on Sept 9, 2007 19:21:45 GMT -5
Here is my set up. 306 Comp SD friendly cam, ported E7s, Pro. Products intake with 70mm TB. MSD coil, cap and rotor, FMS 8MM wires.
Problem(s) About a week ago when leaving work, car didn't want to run with the throttle opened round mid way. It would start to stumble, and just once in awhile backfire up thru the intake. At idle everything seems fine, at Wide Open Throttle it runs great!
Here is what i've done so far...Replaced plugs, wires, rotor, cap, coil, TFS even switch Distributor and Computers out with another SB stang. I've triple checked timming, idel set and TPS vortage. At times I can drive it all day with no problems, next it will act up. Some days it will be running fine then act up a bit then run fine again.
Then yesterday it started something new....cutting off while going down the road. I just replaced the ignition switch a month ago, and have re-checked it..all looks good there. Fuel press. is good at idle and when reving it up.
I know it's got to be something electrical but i'm lost!!!!
HELP!!!!!!!
|
|
coupe
Pedal Pony
Posts: 13
|
Post by coupe on Sept 9, 2007 21:46:26 GMT -5
Here is my set up. 306 Comp SD friendly cam, ported E7s, Pro. Products intake with 70mm TB. MSD coil, cap and rotor, FMS 8MM wires.
Problem(s) About a week ago when leaving work, car didn't want to run with the throttle opened round mid way. It would start to stumble, and just once in awhile backfire up thru the intake. At idle everything seems fine, at Wide Open Throttle it runs great!
Here is what i've done so far...Replaced plugs, wires, rotor, cap, coil, TFS even switch Distributor and Computers out with another SB stang. I've triple checked timming, idel set and TPS vortage. At times I can drive it all day with no problems, next it will act up. Some days it will be running fine then act up a bit then run fine again.
Then yesterday it started something new....cutting off while going down the road. I just replaced the ignition switch a month ago, and have re-checked it..all looks good there. Fuel press. is good at idle and when reving it up.
I know it's got to be something electrical but i'm lost!!!!
HELP!!!!!!! [/quot The O2 sensors will cause the symptoms you are describing. Dissconnect them and see if it clears up.-Scott |
|
|
|
Post by 93volpe on Sept 9, 2007 22:27:20 GMT -5
Bones, I had a similar problem, accelerating on a cool engine and on occasion when at operating temp I'd get a "cough" (passenger side) and then a week or so later a cut off at the light became the standard too ... I cleaned the idle air bypass valve and the throttle body also.... so far that has seems to have worked... may want to check that also www.muscularmustangs.com/iac.phpHanley 93volpe |
|
|
|
Post by silver91hatch on Sept 9, 2007 22:48:40 GMT -5
The IAC or Idle Air Control valve or the EGR valve both get stopped up by some blow-by and carbon deposits. You can clean the EGR with brake clean but I would just replace the IAC, dont really trust cleaning them.
|
|
|
|
Post by BUGMAN on Sept 10, 2007 22:13:06 GMT -5
The O2 sensors will cause the symptoms you are describing. Dissconnect them and see if it clears up.-Scott[/quote]
Been there done that!
Along with a bad ground at the same time.
|
|
|
|
Post by bonesgt on Sept 11, 2007 19:21:52 GMT -5
Ya'll know i'm feel really dumb right about now.....seem that the vacuum line on the BAP/MAP was half way off...LMAO I plugged it back up good an tight, took it for a test trip round the hood and no problems. Then I waited about an hour and went for another drive this time taken it down the road a few miles, still runs great and no issues. Damn I'm so hoping this was it and the problem is fixed!!!!
|
|
|
|
Post by Notch93 on Sept 11, 2007 20:19:56 GMT -5
At least it was something easy.
|
|
|
|
Post by SVTSkip on Sept 15, 2007 10:42:01 GMT -5
If it starts cutting off ( I believe that was how you described it ) again Scott, take a couple minutes to check the EEC relay located up above the EEC. Mine went bad and was doing the same thing. It would seem fine for weeks, and then the problem would rear its ugly head time and again ! Finally got through TPS, Dist, TFI Module, Coil, etc... and decided to check the relay. Put a screwdriver on the corner of it and tapped, and the car would die everytime ! Replaced it and no worries since LOL !!!
|
|
