Question about 1991 Toyota Pickup

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Check Engine light flickers occasionally

I have a 91 4WD pickup with the 3VZ engine. After towing a trailer to Oklahoma and back, the check engine light occasionally flickers on. The pickup runs fine. Oil cap and fuel cap are on tight. Vacuum lines visually inspected look OK. Fuel mileage is the same as I had on previous trips. Obviously I have some emissions sensor problems. Coule you give me a list of things which would warrant checking? TIA...jjb

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  • Anonymous Dec 04, 2008

    same problem

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My 1998 mercury mystigue engine light flickers off and on and the mechanic just change the speed sensor and all the fuses.

Posted on Jan 14, 2009

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Check the oxygen sensor or catalytic converter might be bad; but I would check the oxygen sensor first. Also clean the cold air intake sensor, if there is something cover it then you'll see the checkengine flickers on but your engine is running fine.

Posted on Sep 04, 2008

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Lost power to turn sig airbag light and heater control.I pluged trailer lightes in to my tow package


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Check the fuse for the trailer tow parking lamps, this is engine compartment fuse # 5, 20A
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More than likely it's a problem with the wiring. Check the wiring diagram for the trailer again and make sure the wiring is correct. It does seem like a strange problem, but something similar happened to me when I wired my trailer a little loosely on the connectors. Good luck. http://arrowtrailer.com/new.htm

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2001 F150 supercrew w/ factory towing - No tail lights on trailer


Not sure which fuse you checked.
The Engine Compartment Fuse Panel ( Battery Junction Box / BJB ) is where the fuse is for the trailer tow adapter parking lamps.
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Next is the trailer tow adapter park lamp relay. This is what BJB Fuse #5 feeds, and the coil is operated by the truck's parking lamps. This is also in the BJB, Relay 201, it is the 1/2 size relay.

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This is the wiring diagram for the trailer tow park lamps
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4 Answers

F150 Ford 1998 is there a fuse for a trailer and where is it located? Thank you


There are a few fuses for the trailer tow adapter.

1st, is theodd location on the 97-98, engine mini fuse panel has a 20 A fuse forthe stop / turn lamps. Have seen it covered in tape from the factory onsome 97-98 MY trucks.
This is on page 142 in the owners 1997 manual, all the revisions for the 1998 owners manual I have seen do not include this fuse box for some reason.

Download a PDF version from Ford, for the 1997 MY at :

https://www.fleet.ford.com/maintenance/owners_manuals/default.asp

This is a picture of the Power Distribution Box, additional relay box and engine mini fuse panel with the covers off. The 20A in the upper right panel with the red base, is the trailer stop/turn fuse.
3b8aa6c.jpg

The others :
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2. Instrument Panel Fuses ( cab fuse panel by hood release )
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1 Answer

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As listed in the owners manual.

Weight of the Trailer
How heavy can a trailer safely be?
It depends on how you plan to use your rig. For
example, speed, altitude, road grades, outside
temperature and how much your vehicle is used to
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on any special equipment that you have on
your vehicle, and the amount of tongue weight the
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Tongue” later in this section for more information.
Maximum trailer weight is calculated assuming
only the driver is in the tow vehicle and it has all
the required trailering equipment. The weight
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cargo in the tow vehicle must be subtracted
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The following charts show how much your trailer
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4WD Crew Cab Axle Ratio Maximum Trailer Weight GCWR*
Automatic Transmission,
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3 Answers

Is there a hidden 'inline' fuse on a 04/6 cy


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Check all fuses, I had the same issue before.

Good luck.

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1 Answer

Flickering oil lights


Does the oil light flicker only when the engine is 'idling'? Or does it flicker ALL the time? Does it flicker when the engine is cold? Or, only after the engine warms up? Cause could be low oil pressure (check oil level & condition- should be full and clean), could be the oil pressure sending unit going bad, could be electrical (short) in the oil pressure sending unit wire harness, could be sludge buildup in the crankcase clogging the oil pickup tube to the oil pump, or it could be a clogged oil filter or the oil pump is going bad. If you have an after-market oil filter installed, they somtimes rob the system of pressure. There is a Technical Service Bulletin on this for Hyundai Vehicles. You should use the genuine Hyundai Oil filter.
Does the Check Engine light come ON when this happens? Whenever the "Check Engine" light comes on, there is always a DTC (Diagnostic Trouble Code) stored in the ECM (Engine Control Module). You'll need an OBDII (On-Board-Diagnostics) scanner to retrieve any codes recorded/set in ECM. Once you do this and let us know what, if any codes are set, then we can go from there. OR, take/tow the vehicle into a Hyundai Service Center (dealership), pay the diagnostic fee. They will tell you EXACTLY what the problem is and what's needed to fix it (parts, labor, tax, time-frame, etc.). You could also go to http://www.hmaservice.com/ and register (vehicle by VIN). Afterward, you'll have access to technical information (manuals, wiring diagrams, service bulletins, etc) about your vehicle.

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