Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super spread around car that I am ready to steer off a cliff. had a idle surge misery that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After a pain 2-3 swing used IAC s, I took it to the master tech at lexus. He said it was the IAC valve. He tried my used ones.. and finally a rebuilt one. nevertheless had issues. back to the dealer.. this time he says, it needs a ECU. I did a lot of research upon them, and found that its a common misfortune as soon as this car.. bought a used one.. more trouble. had the native one rebuilt by a specialist.. and that s where I am at now.. Put it in tonight and the car idles at 2k rpm. Does the TPS compulsion to be re-adjusted? The master tech did every sorts of diagnostics on every partnered parts (tps, maf, iac). $100-200 every become old I give a positive response it realize the dealer for diagnostics.. on going problems are in fact surcharge up. I m in two minds to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
If this is a chevy why is the picture of a ford solenoid / starter relay ??? Try going to Mitchells diy . com and buy a online manual ( 30 days for 15 dollars ) ( model specific ) which will give you The next video shows you a common procedure when replacing a flasher unit on a GMC truck voltage with a test light as you operate the different settings. You may need your vehicle repair manual to Check your ABS, my brake light on the dash would come on at times when I applied the brakes, and what went out was the black box that controls the ABS. I have a 1993 K-1500, so if you have ABS I'd Note the diagram for stop lamps. Did you check voltage and ground, anywhere? Use a test light. See stop lamp fuse At the lower stop lamps, the lite blue wire is voltage, the black wire is ground. I would start looking with the ground connections. If it was an alternator, the battery would carry the load. There should be both a ground to the engine and to the frame. it'sbehind the glove box. open the box,and take out the black liner with 4-7mm bolts. look for a white square flat box with 2plugs going into it. thats ur vsb. make note of the numbers on it, they .
I am thinking ground somewhere also I don't see any wiring to third brake light, and according to my source they were required beginning in 1986 for cars and 1994 for light trucks. Does it have one? .

Might afterward be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can get a quick irregularity locate if you unplug the meter and rule the engine without it. if the engine condition is the similar subsequently chances are the meter or the link to it is faulty. Its as well as worth cleaning the MAF sensor wires, as they can get coated gone dirt greater than grow old which then offsets the reading. Use some entre cleaner or brake cleaner to spray onto the wires to sever the dirt on no account adjoin the wires gone all as they are utterly fragile
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Photo Schematics for 94 chevy 1500 tail light wiring diagram
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