Last post on Apr 30, 2009 at 11:07 AM
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Toyota Pickup, Truck
#451 of 460 Re: Idling problems [edwardglampe]
Feb 26, 2009 (8:52 pm)
Might be worth a shot to check your idle speed. It should idle, with NO accessories running (A/C, anything electrical, radio, etc..) at around 750 RPM.
I've had my idle set too high and it causes the surging you describe because the brake lights cause an alternator drain, as well as the brake booster causing an engine drain. So, the computer tries to rev the engine up a little, but gets confused, since it's already idling so high. Then, it drops the idle. All this causes the up and down idle you're experiencing.
#453 of 460 Re: 1991 2 wheel drive elec. issues [nairb]
Mar 06, 2009 (3:18 pm)
Brian, I am having the same problem, check my alt and alt pass test, battery was good also, was the fuse your problem or what was the final fix for your problem, Mark
#454 of 460 Re: Idling problems [edwardglampe]
Mar 17, 2009 (5:14 am)
I have a 1993 pickup truck with a 4 cylinder 22RE engine, manual transmission, and 245,000 miles. I was experiencing the same thing and worse. Since you didn't mention it, I will assume the check engine light isn't on. If the check engine light is on, it will certainly help in the diagnosis. I was amazed at how poorly my truck was running before the check engine light came on. My problems were centered in the oxygen sensor and the air mass sensor. My truck has only one oxygen sensor, in front of the catalytic converter. According to my mechanic, this oxygen sensor controls fuel input to the electronic fuel injection. Its an easy part to replace assuming the mount on the exhaust pipe is still in place and the two bolts on the flange can be removed. I did this part myself. The mechanic replaced the air mass sensor. I wasn't familiar with this one, but I think its located in the box on top of the air cleaner. Short story, the problems are fixed and the truck is running great.
#455 of 460 headlights out!!!
Mar 18, 2009 (6:44 am)
i have a 1987 22r 4 wheel drive when driving down the road at night the headlights go out,if you flick the high beam back and forth they will eventually come back on,also when this happens on low beams high beam indicator comes on,is it headlight switch or relay?????
Mar 25, 2009 (3:47 pm)
I am having trouble with my air conditioner. I put 2 cans of freon in it Sat. after evacuating the system. I replaced the expansion valve because of problems. I could see it was doing the same thing, so I did not add a 3rd.
engine off, gauges hooked up. suction 90lbs. high side 100lbs. engine running, air on, -30 suction, high 100???
Also I have a sight glass on the dryer and nothing is circulating.
#457 of 460 88 toyota pickup v6
Apr 07, 2009 (6:32 am)
engine surges and runs rough,meter ck alternator engine at idle 12 volts max turn lights on voltage jumps around max 11 to min5-6 volts engine runs rough turn lights off engine runs smoother but idles high , push brake pedal down engine surges up and down alternator does like previously described. no ck engine light. changed alternator no help
#458 of 460 Re: 88 toyota pickup v6 [mp88]
Apr 07, 2009 (8:03 am)
Check the fuses and fusible links. Especially the larger fuses, especially the one labeled "ALT". It should be about 80A. See if there is ANY corrosion on the fuses themselves or their respective connections.
After that, make sure your idle speed is set properly. My truck had a similar problem with surging because my idle was set too high. It would surge, then die, back and forth when I was holding the brake pedal, similar to what you're saying.
Something else to check, while you have your multimeter out is the Throttle Position Sensor. May be giving bad readings to the computer.
Hope this helps.
#459 of 460 Re: Idling problems [edwardglampe]
Apr 18, 2009 (6:50 pm)
I had a similair problem. Could not figure it for a couple of years. There is a part under the throttle body where a coolant line runs into it. There was a piece of silicone from the water pump stuck inside the line. I took the throttle body off and cleaned out everything and the part (don't know right off what it is called)and the truck has not done it since. The reving up and down will wear your timing chain and everything else out ( replaced two before I cleaned the line)
#460 of 460 Windshield wipers committed Kamikazee!
Apr 30, 2009 (11:07 am)
The windshield washer on my '89 pickup quit & then #$$!%^ the wipers, too,
about a week later! Fuse & fuseblock circuit tested hot and the female connector
at the trans/motor assy. on the firewall is hot on one terminal only when I turn
key & wiper switch on. I'm notta "parts-replacer until it's fixed"-type. The wipers
are basic 2-speed (non-intermittent).
I have no schematic & need to know if it's the column-stalk switch, or
the motor/assy., or (gasp!) something else?