Car stumbling on acceleration and surging

Tiny
SOMOKAI
  • MEMBER
  • 1986 PORSCHE 944
  • 4 CYL
  • 2WD
  • MANUAL
  • 142,000 MILES
My vehicle will start up fine but as soon as I get out on the road driving it will lose a lot of power and sound like its backfiring. After a few seconds it will surge forward like it got all of its power back. This happens anytime I want to accelerate unless I floor it. Also when it is running at road speed it seems to run a little rough and it lacks power anytime I have to go up a hill. I've already replaced the fuel filter, fuel pressure regulator, and fuel pump. However with the fuel pump when I replaced it it was with a Warblo High Performance pump and all it did was buck so I put the old one back it and it stopped bucking but the old problem was still there.
Wednesday, May 20th, 2009 AT 8:49 AM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
These car had issues with the crankshaft angle sensors going out here is a guide to show you what you are in for when doing the job and a diagrams below to show you the location on your car.

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is.

Cheers
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Wednesday, May 20th, 2009 AT 4:18 PM
Tiny
KRISTENLEE
  • MEMBER
  • 0 POST
Yep this what the problem with my car it cost me $87.00 for the sensors all fixed !
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Friday, July 20th, 2018 AT 4:05 PM

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