SPONSORED LINKS

Stumbles on fast (hard) acceleration but runs OK on normal acceleration

Tiny
THESTITCHER
  • MEMBER
  • 1988 CHEVROLET BERETTA
  • 2.0L
  • 2WD
  • AUTOMATIC
  • 68,000 MILES
Engine runs fine but will stumble if you give it gas to fast. Have checked following parts/systems fuel & air filters, fuel pressure, TPS, MAP. Vacuum leaks. O2, EGR, Temp sensor, Etc.
Monday, May 25th, 2015 AT 9:58 PM

6 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,645 POSTS
When was the last tune up?
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Tuesday, May 26th, 2015 AT 5:30 AM
Tiny
THESTITCHER
  • MEMBER
  • 4 POSTS
Last tune up was done a month ago. Found a problem with the throttle body at that time (hole in fuel return port cap)which allowed pressure to by pass regulator. I repaired problem and now have pressure on rail.
Was this
answer
helpful?
Yes
No
Tuesday, May 26th, 2015 AT 6:44 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,645 POSTS
Have you checked to see if there are any trouble codes stored?
Was this
answer
helpful?
Yes
No
Tuesday, May 26th, 2015 AT 8:35 AM
Tiny
THESTITCHER
  • MEMBER
  • 4 POSTS
NO codes set.
Was this
answer
helpful?
Yes
No
Tuesday, May 26th, 2015 AT 8:59 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,645 POSTS
Have you checked back pressure from the catalytic converter?
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Tuesday, May 26th, 2015 AT 6:37 PM
Tiny
THESTITCHER
  • MEMBER
  • 4 POSTS
Converter was replaced about 3 years ago. I will check as soon as I get home next week.
Was this
answer
helpful?
Yes
No
Wednesday, May 27th, 2015 AT 7:17 AM

Please login or register to post a reply.

Related Engine Hesitate Content

Vacuum Leak Test and Repair
VIDEO
Vacuum Leak Test and Repair
Instructional repair video
Hesitation
GUIDE
Hesitation
An engine hesitation is an interruption of continuous power during acceleration. When a engine is hesitating it will cause the car to lunge or surge which will cause a...
VIEW MORE

Sponsored links