1991 Chevy Cavalier Won't rev past 3000 RPM, loses power a

Tiny
GOATAH
  • MEMBER
  • 1991 CHEVROLET CAVALIER
  • 6 CYL
  • FWD
  • MANUAL
  • 240,000 MILES
Driving or parked, the engine will not go above 3000 RPM when you floor it. If you baby it, the car will go up to around 4000 but still won't redline. Engine makes plenty of power up to the point where it nosedives. No knocks, ticks or rattles. No vac leaks, EGR is good, has new ignition module/coil packs.
Monday, March 30th, 2009 AT 5:14 PM

3 Replies

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Have the backpressure tested, to see if CAT is partially clogged.

Another possibility is that the fuel pump is losing pressure, check pressure with mechanical gauge, pressure should be above 40psi and hold the pressure after pump is off, if not check fuel pressure vacuum line for the presence of gasoline.
Was this
answer
helpful?
Yes
No
Tuesday, March 31st, 2009 AT 6:00 AM
Tiny
GOATAH
  • MEMBER
  • 2 POSTS
Cars got no cat. It's got a resonator there instead and its clear through. I'll check the pump tonight though, and may as well change the filter again too.
Was this
answer
helpful?
Yes
No
Tuesday, March 31st, 2009 AT 8:57 PM
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
It could also be ignition, but check the fuel first.
Was this
answer
helpful?
Yes
No
Wednesday, April 1st, 2009 AT 7:44 AM

Please login or register to post a reply.

Related Engine Low Power Content

Fix an Engine with Low Power!
VIDEO
Fix an Engine with Low Power!
Instructional repair video
Symptoms of Low Engine Power
GUIDE
Symptoms of Low Engine Power
The power your car's engine is producing is important. When you step on the gas you need your car to accelerate, mainly to keep you out of trouble when getting onto the...
VIEW MORE