low speed surging

Blue89gt

Founding Member

Jan 24, 2002

404

0

0

Denver Colorado

May 17, 2004

#1

• May 17, 2004

• #1

I just replaced the fuel pump and fuel pump control relay on the car because the pump went out.

I did a complete tune-up on the car and filled it with fresh gas. at 2000rpm the car will surge if i let off of the gas and let the car coast in gear. lower RPM produces the same bucking.

when i am maintaining speed (slight throttle) the car surges similarily as as the coasting.

I cannot figure it out there are no codes and the car other than that runs fine.

could it be the TPS sensor?

 

S

stang2004

Founding Member

Sep 23, 2001

177

0

0

Northern Jersey

May 17, 2004

#2

• May 17, 2004

• #2

Blue89gt said:

I just replaced the fuel pump and fuel pump control relay on the car because the pump went out.

I did a complete tune-up on the car and filled it with fresh gas. at 2000rpm the car will surge if i let off of the gas and let the car coast in gear. lower RPM produces the same bucking.

when i am maintaining speed (slight throttle) the car surges similarily as as the coasting.

I cannot figure it out there are no codes and the car other than that runs fine.

could it be the TPS sensor?

Click to expand...

bro my car does the same thing, i asked a couple days ago the same question. might be a page back. I was told its just normal of a 5 speed car.

 

Ranchero5.0

The Voice of Reason

Jan 1, 1999

5,306

0

76

Hagerstown MD

May 17, 2004

#3

• May 17, 2004

• #3

Yep, reset the TPS. you may have to play with it a couple times to get it to smooth out. On mine a slight throttle the A/F would go off the scale lean and it would buck. It was worse at 200 degrees after running the interstate. I also set it hot ( a little different than cold).

Jamie

Jamie

 

B

blk92stangg

New Member

Jan 30, 2004

583

0

0

Hawaii

May 17, 2004

#4

• May 17, 2004

• #4

My friends did the same. We cleaned the IAC, EGR, and the distributor cap and rotor. Ran fine after that. Use some fine sandpaper to clean off the points and rotor, btw.

 

Blue89gt

Founding Member

Jan 24, 2002

404

0

0

Denver Colorado

May 18, 2004

#5

• May 18, 2004

• #5

well, the rotor is brand new, i dont belienve my car has points (EFI) and I'll check the TPS today. thanks

 

S

stang2004

Founding Member

Sep 23, 2001

177

0

0

Northern Jersey

May 18, 2004

#6

• May 18, 2004

• #6

i cleaned my EGR and IAC, adjusted the TPS, i have a new cap and rotor and all that.. and the thing still bucks if i dont ride that clutch out. sometimes it bucks hard enought that if i had dentures i think they would hit teh dash at this point i just toss it in 2nd, and it goes away

 

Blue89gt

Founding Member

Jan 24, 2002

404

0

0

Denver Colorado

May 19, 2004

#7

• May 19, 2004

• #7

well i took the S/C off today and will be selling it on ebay. the surging seems to be better now that I adjusted the tps.

there is a low speed skip. it sounds like it is missing on one cylinder. i just dont get it. i will be looking at the firing order in a minute. i hope that fixes the problem.

any ideas. it seems like it goes away ofter 2000rpm.

 

Blue89gt

Founding Member

Jan 24, 2002

404

0

0

Denver Colorado

May 20, 2004

#8

• May 20, 2004

• #8

well the car actually seems to be skipping at all rpms.

I checked the timing and the firing order, its all good.

Tomorrow I'll check to see if there is spark at all of the cylinders, hopefully there is. I am starting to think it is a head gasket maybe. thier are a small amount of small bubbles in the rad. fluid.

 

venom88

New Member

May 5, 2004

98

0

0

Flint, Michigan

May 20, 2004

#9

• May 20, 2004

• #9

I had the Same Problem

I had to replace my TPS i adjusted it a few times and still had problems went to the local store and replace it. No more bucking bronco.

Could also be a broken plug wire