No Codes What Is Wrong?
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Joined: Nov 2003
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No Codes What Is Wrong?
HI, I HAVE A 1992 F-150 5.0 -4X4. NO CODES ARE COMING UP,THE TRUCKRUNS GOOD AT A HIGH RPM,BUT WHEN JUST PUTTING ALONG AT A LOW RPM 1500 OR LOWER THE TRUCK SEEMS TO HAVE A HESITATION IN IT AND NOT VERY MUCH POWER.UNTIL I KICK DOWN TO A LOWER GEAR AND GET THE RPM'S UP THEN IT RUNS FINE. JUST GAVE IT A COMPLETE TUNE-UP,
NEW FUEL FILTER.GARAGE TOLD ME TO TRY RUNNING HIGH TEST
GAS , DID NOT HELP. I HAVE BEEN TOLD EVERYTHING FROM THROTTLE SENSOR TO TORCH CON. SHUDDER IS THE PROBLEM.
BUT WITHOUT ANY CODES TO STEER ME IN THE RIGHT PLACE I HAVE NO CLUE WHERE TO START.DOES ANYONE HAVE ANY IDEAS
THANK YOU FOR YOUR HELP!!!!!!!!
NEW FUEL FILTER.GARAGE TOLD ME TO TRY RUNNING HIGH TEST
GAS , DID NOT HELP. I HAVE BEEN TOLD EVERYTHING FROM THROTTLE SENSOR TO TORCH CON. SHUDDER IS THE PROBLEM.
BUT WITHOUT ANY CODES TO STEER ME IN THE RIGHT PLACE I HAVE NO CLUE WHERE TO START.DOES ANYONE HAVE ANY IDEAS
THANK YOU FOR YOUR HELP!!!!!!!!
Posting Guru
Joined: Jul 2003
Posts: 1,280
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From: alaska
no codes usually means a bad ground somewhere, if you have a bad ground your controll box wont send any signals or recieve then . the other 'much worse ' option is that your brain is dead , another test might be a back pressure test at the cat, but you would still show codes . are you using a hand held tester or are you reading the check engine light? the hand held costs about $40.00 bucks and is a good way to verify things. run a 10 guage wire from the negative post on your battery to the frame, then to the firewall . any clean bolt or screw will do . good luck ,bob
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
Usually a clogged cat will cause problems at anything above an idle, which is opposite of his problems. I agree about checking the computer wiring, that's usually the problem. Check continuity between SIGRTN and ground as well. Somehow I don't remember making that post above...
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