| Question: |
hi anthony
well i have this 91 1.5 sohc, last year i replaced the head and belt ,due
to broken belt bent valves !when i put it back together , it ran like
a scalded dog !(well for a 1.5) (that was about 6 mo ago) any way customer
has brought it back , it now will only start, runs really bad, and when
you push the peddle down to the floor, it will not rev, it may go up by
100 rpm . comp is 135-138 across all 4 timing is on the mark , cked valves
, clearance ok on all , idle servo works, TPS works, shows NO codes, new
cp,rtr,wir,plgs,.
removed the exuast at the 3 bolts bottom or the exst manafold to eleminate
possable clogged cat.
injectors spraying fine and fuel pressure is correct, plugs look real
rich,
after looking at 25 pages of yours here i didnt find this one !. caps
in ecm ? maybe ?
thanks Brian W. ASE CERT MECH
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| Answer: |
Brian,
Faulty caps in the ECM are definitely a possibility. Pull the ECM and visually
inspect it for damage. It's usually pretty obvious if the caps have started
to leak.
If you haven't already, check the 02 sensor. I know those sometimes do
not trip the check engine light when they start to go bad. I'm not sure
exactly where the cam/crankshaft position sensor is on that car, but that
can cause rough running and low RPMs due to timing retardation if it is
faulty. But many false readings and misbehavior of sensors can be caused
by a failing ECM. So check that first.
Good luck!
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