HELP!!!! bad miss/vibration!!

Black_Mustang · Sep 2, 2004

hey guys whats up....i got a 88 5.0 that i bought about 6 months ago ago and just now gettin ready to drive it a few weeks ago i took it to the car wash and when i was coming out i kinda gunned it a little (ok alot) but nothing i know it cant handle (this is my third one) and now it has a bad and steady miss vibration under any load...it has 215k miles and i bought it from the original owner than took pretty good mechanical care of it it is a little leaker but thats nothing big....anyhow i have replaced the plugs (.054) wires cap rotor and coil and still nothing...dist is good teeth are good timing is *14 on the nose and advances steadily...the motor mounts from what i can see however seem to be chipping away...im thinking maybe i ripped it the rest of the way when i did that...car has good power it seems though i havent driven it much since that happened and when i have not very hard....idle is rock solid and when free revving sounds strong and relatively smooth so i just dont see how it could be a miss...i know it could be a ton of things but i was hopin somebody on here had some pointers...it almost sounds like a cylinder isnt firing but im sure it is cause the miss goes away when not under load....any ideas guys?? i havent had a chance to drive this car since i bought it in may....HELP!!!!!!

other things-
-i have a new fuel filter that i havent had a chance to install yet.
-fuel pump is good
-balancer looks good

HISSIN50 · Sep 2, 2004

have you pulled codes? when doing so, run the balance test - checks each injector for proper pulse/fire.

good luck.

jrichker · Sep 2, 2004

Dump the codes and see what the computer says is wrong…

Here's the link to dump the computer codes with only a jumper wire or paper clip and the check engine light, or test light or voltmeter. I’ve used it for years, and it works great.

See http://www.troublecodes.net/Ford/
OR
See http://www.dalidesign.com/hbook/eectest.html for more descriptive help
OR
See http://www.mustangworks.com/articles/electronics/eec-iv_codes.html

IF your car is an 86-88 stang, you'll have to use the test lamp or voltmeter method. There is no functional check engine light on the 86-88's except possibly the Cali Mass Air cars.

Codes have different answers if the engine is running from the answers that it has when the engine isn't running. It helps a lot to know if you had the engine running when you ran the test.

Trouble codes are either 2 digit or 3 digit, there are no cars that use both 2 digit codes and 3 digit codes.

For those who are intimidated by all the wires & connections, see http://www.actron.com/product_detail.php?pid=16153 for what a typical hand scanner looks like. Normal retail price is about $30 or so at AutoZone or Walmart.

MUSTANGJOE · Sep 2, 2004

Did you check the fireing order of your spark plugs?

Black_Mustang · Sep 2, 2004

im gonna check the codes tomorrow morning, with school/work/being sick i havent had the time/energy....dont know if it will get anywhere though

F/O is 1-3-7-2-6-5-4-8....i believe that is correct

anybody else HELP!!

MUSTANGJOE · Sep 3, 2004

make sure those #'s are correct. Once I posted a thread asking for the fireing order and I got the wrong ones! make sure, goo d luck

AZNEAL311 · Sep 20, 2006

Need Help Pulling codes

I have an 88 and there is a check engine light on the dash. The only time I ever see it is when i am starting the car and thats only for a brief second. I have read that 88s have to use a voltmeter or test light. I tried to pull codes using the Check Engine light but I got nothing. No clicking or wierd sounds when i jumped the wires. I am pretty sure i am doing it right. Does any one know for sure if 88s require a test light?

HISSIN50 · Sep 20, 2006

The differentiation generally is that SD cars don't have a functional CEL, whereas MAF cars have one.

Why your CEL burps for you is strange.

In any case, I would just use a test light or other means to seeing flashes.
Good luck.

AZNEAL311 · Sep 20, 2006

I have tried to use a test light. When I jump the Signal return and the System test input I get nothing. No funny noises, no clicking nada. It is just like i did nothing at all. And my car was not origanally MAF. It was converted.

Black_Mustang · Jan 10, 2007

Hmm, I havent had a mustang for over a year and a half or used this email for even more...

man, im seriously depressed now god i miss having one.

HELP!!!! bad miss/vibration!!

Black_Mustang

HISSIN50

"How long does it take to get help in here?

jrichker

StangNet's favorite TOOL

MUSTANGJOE

Silver Stanger

Black_Mustang

MUSTANGJOE

Silver Stanger

AZNEAL311

New Member

HISSIN50

"How long does it take to get help in here?

AZNEAL311

New Member

Black_Mustang

Similar threads

HELP!!!! bad miss/vibration!!

"How long does it take to get help in here?

StangNet's favorite TOOL

Silver Stanger

Silver Stanger

New Member

"How long does it take to get help in here?

New Member

Similar threads

Privacy & Transparency

Privacy & Transparency