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94 940T hesitation 900

posted by  rjk2 on  Mon Apr 30 20:04 CST 2012
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Car sat for awhile (4 mos) & it has developed a hesitation/stumble under acceleration from low speed. None at high speed.
Bosch
O2 sensor checks out as OK.
I'm fairly convinced it is the MAF but want to check a few things first.
Hesitation/stumble is worse when it is at operating temp.
I cleaned the MAF & connectors and the hesitation was less pronounced.
A couple of items that may or may not be affecting the scenario
1) the speedo trace is broken on the instr cluster so no speedo signal is present, could this be affecting the hesitation?
2) There is an indication of a possible sticky exhaust valve that gets worse as the engine heats up, same question.
--
1999 E320 1994 F150 1989 560 SL 1986 560 SL (deceased) 1988 300 TE (departed) 1994 945T (daughter's) 1988 244DL (it lives!) 1986 242Ti (fallow) 1968 GT500KR (under restoration)






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New 94 940T hesitation [900]
posted by  rjk2  on Mon Apr 30 20:04 CST 2012 >


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