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1992 Geo Prizm missing

Tiny
PRIZM25
  • MEMBER
  • 1992 GEO PRIZM
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 150,000 MILES
I have a 1992 geo prizm LSI, fuel injected. At idle up to about 2500 RPMs it is missing or only riuuing on three cylnders, I replaced the fuel injectors, oxygen sexsor, and fuel filter, I have also tested the compression and it is fine.
Sunday, October 19th, 2008 AT 2:27 PM

6 Replies

Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
Your gonna have to check your spark, fuel and or your knock sensor.
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Sunday, October 19th, 2008 AT 3:21 PM
Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
https://www.2carpros.com/car_repair_video/test_fuel_injection_pressure.htm
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Sunday, October 19th, 2008 AT 3:22 PM
Tiny
LEGITIMATE007
  • MECHANIC
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https://www.2carpros.com/car_repair_video/test_engine_ignition_system.htm
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Sunday, October 19th, 2008 AT 3:24 PM
Tiny
PRIZM25
  • MEMBER
  • 3 POSTS
We've already checked all those things. Just today (10/19) we disassembled the distributor, spark plug wires, fuel system, oxygen sensor amd the onboard computer. The problem continues! Any other ideas?
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Sunday, October 19th, 2008 AT 5:49 PM
Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
Did you look for vacuum leaks or pinched vacuum hoses?
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Wednesday, October 22nd, 2008 AT 9:08 PM
Tiny
PRIZM25
  • MEMBER
  • 3 POSTS
Yes, I was wondering if the charcole canister could cause this?
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Thursday, October 23rd, 2008 AT 4:36 PM

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