fuel problems
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fuel problems
new to the forum here, seems to be much expertise here, hope you all can help out. have an 88 b2, 5 speed, 4x4. been sitting about 2 yrs, due to drivetrain problems. got that fixed. now, when driving, acceleratedes good, till high gear, then skips. changed fuel filter, drained tank. any help appreciated.
Postmaster
Joined: Jul 2004
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From: Bixby, OK
Welcome to FTE, there's a lot of people here that'll help you out.
Now for your problem.. have you pulled codes? Ken has posted how to pull codes. You should check it out, it's on the top under the Bronco II part.
Now for your problem.. have you pulled codes? Ken has posted how to pull codes. You should check it out, it's on the top under the Bronco II part.
Mountain Pass
Joined: Sep 2003
Posts: 215
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From: San Diego
Originally Posted by silent.d
can't remember the code number right off hand, but bottom line, it said the hego sensor indicated my fuel mix was lean. fuel pressure regulator or low pressure fuel pump, maybe?
Postmaster
Joined: Dec 2001
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From: UT
There are three kinds of EEC-IV code: key on engine off (KOEO), continuous memory (CM), and key on engine running (KOER). O2 sensor can't effectively be tested KOEO, so an O2 sensor code can only show up in the KOER test, and in the CM codes (after separator pulse during KOEO test). I'm leading up to the question: is your O2 sensor code a KOER code, a CM code, or both? One caution about a KOER lean code: Be sure to preheat the O2 sensor (run the engine at operating temperature for a couple of minutes immediately before performing the test), or you will get a false KOER lean code. It can be easier to diagnose KOER codes becaue they represent hard faults that are present here and now. CM codes can point to intermittent faults, which can be harder to diagnose.
With just about any code, the first thing I would do is inspect the wiring between the EEC-IV computer and the indicated sensor. Check for breaks, loose connections, shorts, etc. Don't forget to include checking the computer grounds.
With just about any code, the first thing I would do is inspect the wiring between the EEC-IV computer and the indicated sensor. Check for breaks, loose connections, shorts, etc. Don't forget to include checking the computer grounds.
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did the koer test per instructions in my computer code retrival book. ran the engine a couple minutes, turned off for 10 sec, restarted, goosed the accelerator at the appropiate time, read the codes. the only thing i haven't done is what ken suggested w/ the pressure, and i'm wondering, will the pressure guage tell me if it's the regulator or low press. pump?
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With just about any code, the first thing I would do is inspect the wiring between the EEC-IV computer and the indicated sensor. Check for breaks, loose connections, shorts, etc. Don't forget to include checking the computer grounds.[/QUOTE]
where is the puter and hego sensor located??
where is the puter and hego sensor located??
Postmaster
Joined: Dec 2001
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From: UT
Assuming your '88 is the same as my '87, the computer is behind the passenger kick panel, just below the glove box, just forward of the passenger door.
HEGO is in the exhaust "y" pipe where the two pipes come together just forward of the catalytic converter.
HEGO is in the exhaust "y" pipe where the two pipes come together just forward of the catalytic converter.
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