My 1996 Cobra has 91k miles. On the way home, it started sputtering/hesitating during acceleration, mainly in gears 2-5. I also noticed the voltage meter on the car a little to the left(R in NORMAL), but it went back up and stayed.
I made it home and did a basic check. It revs fine when stopped, idles fine, doesn't try to stall.
My plugs and wires are 2years/20k old.
2k on new O2 sensors.
IMRCS were deleted last year and I have a tune for it.
Fuel filter is 2-3k miles old.
No DTCs are showing.
Updated:
Things I have checked:
-fuel pressure is 29-30 psi at idle, goes up to 39 when I disconnet vacuum from FPR. This eliminates fuel pump IMO.
-I used a mechanics stethoscope and checked each injector, they all were ticking steadily and sounded the same.
-Battery is at 12.6V off, 14.1V at idle
-Both ignition coils read primary resistance 1 ohm, secondary of 13-14.5 K-ohms on all pairs
-All spark plug cylinders/tunnels were clean and clear of oil, no leaks in grommets for valve covers
-all spark plugs were normal and gapped correctly.
5/11/15-next thing to try: replacing spark plug wires, maf cleaning, then datalog, then mechanic after that--my local dealership is awesome and priced reasonably thank goodness. I'm stumped but I'm also just a shade tree mechanic. This may be a job for the pros because I'm out of ideas.
5/13/15: problem solved. It was the wires. Only 20k miles on FRPP 9mm wires. Twice now i have been fooled to think it wasn't wires.
I made it home and did a basic check. It revs fine when stopped, idles fine, doesn't try to stall.
My plugs and wires are 2years/20k old.
2k on new O2 sensors.
IMRCS were deleted last year and I have a tune for it.
Fuel filter is 2-3k miles old.
No DTCs are showing.
Updated:
Things I have checked:
-fuel pressure is 29-30 psi at idle, goes up to 39 when I disconnet vacuum from FPR. This eliminates fuel pump IMO.
-I used a mechanics stethoscope and checked each injector, they all were ticking steadily and sounded the same.
-Battery is at 12.6V off, 14.1V at idle
-Both ignition coils read primary resistance 1 ohm, secondary of 13-14.5 K-ohms on all pairs
-All spark plug cylinders/tunnels were clean and clear of oil, no leaks in grommets for valve covers
-all spark plugs were normal and gapped correctly.
5/11/15-next thing to try: replacing spark plug wires, maf cleaning, then datalog, then mechanic after that--my local dealership is awesome and priced reasonably thank goodness. I'm stumped but I'm also just a shade tree mechanic. This may be a job for the pros because I'm out of ideas.
5/13/15: problem solved. It was the wires. Only 20k miles on FRPP 9mm wires. Twice now i have been fooled to think it wasn't wires.
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