engine miss 2000-3000 rpm
engine won't rev past 2k-3k. gas gauge doesn't work (low fuel light works). When I add fuel additive, revs higher for a while. same RPM limit in any gear. runs up to 80 mph, just can't get there very fast.
rotor/cap/wires look good, pump has been replaced before. 1994 5.2 2-wheel drive my thoughts: fuel pump or collapsed fuel line (I'm in S. California, lots of ethanol). Any help is appreciated! frankabuck@gmail.com |
1994 - it should still have the frame rail mounted fuel filter; has it been replaced recently?
What kind of shape is the cat(s) on it? RwP |
Ralph, the 94 5.2 has an in-tank filter. Id look at eh cats too. I would think a fuel line collapse would cause lean condition and detonation.
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Originally Posted by Snowman451
(Post 3397041)
Ralph, the 94 5.2 has an in-tank filter. Id look at eh cats too. I would think a fuel line collapse would cause lean condition and detonation.
And you're right, I was thinking 1992/1993 which still had the frame mounted filter. Also. RwP |
I looked at first post, didn't explain correctly (it was late).
Truck starts missing or acting like it's hitting a rev-limiter, When adding fuel treatment, revs a little higher for a while. Truck just passed annual smog check and when I bang on cat, it doesn't make noise. I've replaced the cat two times before, and it was really noisy. |
Failing crank or cam sensor. Maybe low fuel pressure?
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Thanks for the reply. Already planning a fuel pump replacement (gauge doesn't work). Is there a way to test the crank or cam sensor?
Thanks. |
Not without an oscilloscope.....
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