cel

My 91 has been f'ing up lately. At first I thought fuseable links, but I changed them and still the same! I have 12 volts to the underhood fuse box, but only 3.7volts at the B+ terminal in the firewall mounted test port........????? Any help would be great! Can't find it in FSM!

Uggggg!!!! Need good qualified Tech advice. And probably a good qualified Technician as well. My daughter has a 2004 2wd 4Runner with the 4.7 V8 with 116k miles. Check Engine Light !!! It's throwing CEL codes for the Air Injection Pump & valves. Codes: P1442 Toyota - Stuck Closed In...

What could be the likely reasons for CEL @ 215,000 miles on a stock '97 LX-450?

New here and only owned a 94 (240,000 miles) for a month. I've done a lot of searching and reading on the forum but haven't found exactly what I'm looking for. My CEL went on yesterday and I think it may be because I didn't tighten my gas cap all the way. Is this possible? I pulled code 71 and...

Threw code 71 yesterday so I have been reading threads and taking things apart to see what's going on. Pulled my modulator and vacuum hoses to check for carbon and it was pretty clean. Might even be somewhat new based on how clean the little filter is. But then I turned it over and saw this...

I got a code 52 on my 80 and it mentioned the following 1] Left Knock Sensor Signal abnormal. 2] Knock sensor circuit fault 3] Senor to be tighten too close or too loose to the cylinder body 4] Ignition timing error 5] securing seat of generator or compressor loose 6] too large clearance noise...

Evening, Over the past few weeks I have been trying to fix my 1994 FZJ80. It first started with a CEL. I took it in to have codes read and pulled codes 25 and 26 (air-fuel ratio lean and air-fuel ratio rich). I replaced the O2 sensor and it drove fine for about 500 miles then the CEL came back...

Sorry for the long post. I really believe in providing as much info up front. I appreciate you taking the time to help. I drive a 91 FJ80 with the 3FE. I am desmogged completely (no EGR/Cats/Air Pump). I started having a trifecta of issues last weekend while on my club's annual ride. 1) Belt...