Civic hesitation problem...

it may only throw codes if there's a bad connection - like if the
slider's worn on the carbon track inside the sensor. reverse wiring
won't be a bad connection.

 

Just a thought...Some of these systems take a bit of time for the various
processors to synch and get a baseline established. I don't know about the
Honda Civic but I do know that the Chrysler takes a day or so to get
completely normal.

DaveD

 

Just a thought...Some of these systems take a bit of time for the various
processors to synch and get a baseline established. I don't know about the
Honda Civic but I do know that the Chrysler takes a day or so to get
completely normal.

DaveD

 

Except that both the previous engine and the new engine are both MPFI
with identical throttle bodies...

 

Except that both the previous engine and the new engine are both MPFI
with identical throttle bodies...

 

Yeah, don't think that's an issue in an '89 with OBD-0.

 

Yeah, don't think that's an issue in an '89 with OBD-0.

 

It would really help to separate mixture trouble from ignition trouble. How
about a timing light to see what the timing does when the throttle is opened
a bit? The timing should advance a few degrees, but not jump fifteen degrees
or retard a lot. (It may retard some based on the rise in MAP.) Similarly he
can try adding a squirt of starting fluid into the air cleaner a second
before he opens the throttle to see if that improves the response - which
would point to a lean mixture on throttle opening.

Mike

 

It would really help to separate mixture trouble from ignition trouble. How
about a timing light to see what the timing does when the throttle is opened
a bit? The timing should advance a few degrees, but not jump fifteen degrees
or retard a lot. (It may retard some based on the rise in MAP.) Similarly he
can try adding a squirt of starting fluid into the air cleaner a second
before he opens the throttle to see if that improves the response - which
would point to a lean mixture on throttle opening.

Mike

 

then check the cam timing.

 

then check the cam timing.

 

Ignition timing has already been checked, but I'll pass on the other
suggestion.

 

Ignition timing has already been checked, but I'll pass on the other
suggestion.