allshow&stillthego

i've got a 1990 GTU that i have just put a new stage 1 clutch in along with a RB header, pre-silencer and cat elemination (straight pipe/ test pipe), and Borla cat-back exhaust. The car has 75000 miles on the engine and ran great before (except the clutch) and now has problems when accelerating. it seems like whenever it wants a check engine comes on, the RPM gauge hits 0 and it sputters when accelerating. it will still run and what not but it's just not quite right. any suggestions???

jackhild59

iTrader: (7)

Pull the codes. Sounds like limp mode.

allshow&stillthego

how do i go about pulling fault codes. i'm new to an OBD1 system

bigzman

iTrader: (1)

http://www.johnr.com/cpucodes.html

jackhild59

iTrader: (7)

You are probably going to need this as well.

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/s5-mop-ecu-failure-diagnosis-710938/

Good Luck!

allshow&stillthego

ok. i have the results of the trouble code reading. one of them i saw coming but the other.... not in a million years. they are codes #2- crank angle sensor (which is why the car only cranks sometimes) and #17 O2 senor (the one i saw coming). Now i have two questions. #1. will the failing O2 sensor cause any real problems #2. what do i do about the intermittently failing crank angle sensor?

allshow&stillthego

ok. i ohmed out the crank angle sensor and it checks out. the connector looked very dirty so i cleaned it. big surprise, it still doesn't crank.

allshow&stillthego

still no cranking, just clicking. found fried ground wire from top of tranny to fire wall. could cause my prob? either way, it's getting replaced