No power to fuel pump with test jumper jumped
#1
No power to fuel pump with test jumper jumped
Hey, I am a newbie and have looked down a bunch of threads looking for my particular problem. My '85 4Runner was stored for 2 years, battery replaced and driven twice. The next time it wouldn't start. I checked and do have spark to the plugs. The next thing I checked was for power to the fuel pump. I have checked this in the past by just unplugging the plug to the tank and checking the plug coming from up front with a 12v test light. On my other trucks it would pulse when cranking. This time it didn't pulse or anything. I tried jumping the test plug on the driver side fender (the non-round one) but still got nothing.
Where do I go from here? Please help.
I was so suprised that this old truck of mine is giving me any trouble as it has been ultra dependable for years.
Thanks
Where do I go from here? Please help.
I was so suprised that this old truck of mine is giving me any trouble as it has been ultra dependable for years.
Thanks
#3
Do you hear the CO relay in the passenger side foot well area click when you turn the ignition on with the test jumper installed?
http://www.4crawler.com/4x4/CheapTri...shtml#FuelPump
If not, that relay or the wiring may be bad or any of the fuses or relays upstream from there. If it does click, then check the wiring to the pump for continuity.
http://www.4crawler.com/4x4/CheapTri...shtml#FuelPump
If not, that relay or the wiring may be bad or any of the fuses or relays upstream from there. If it does click, then check the wiring to the pump for continuity.
#4
okay thanks guys. I'll look at it again tomorrow. 4Crawler, hey I saw your name all over these similar posts and it seems like you know your sh**. By the way nice truck. I didn't hear or notice the sound coming from the pass. kick panel the fes times I tried it today with the jumper. I'll pay more attention tomorrow.
#5
Okay today I cranked it over and did notice a click in the cab but it didn't sound like it came from the pass kick panel at all. It kind of sounded like it was coming from the dash somewhere. I stuck my head in through the passenger door to listen while I cranked it over and the sound seemed to come from the middle of the dash. Of coarse still no start.
#6
Sounds like the circuit openiong (C)) relay is not working:
- http://www.4crawler.com/4x4/CheapTri...ORelayLocation
- http://www.4crawler.com/4x4/CheapTri...ORelayLocation
#7
I disabled the starter as you suggested and took the kick panel cover off and I definately heard the clicking of the relay. Thats the circuit opening relay, right? Do I still need to test it or is the clicking a confirmation that it is working? I haven't actually taken the ECU out of the way to see this clicking box yet.
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#10
The AFM is inside the air box:
- http://www.4crawler.com/4x4/CheapTricks/AFM/index.shtml
But it is another thing that makes the CO relay turn on when the engine is running. If the CO relay is not turning on with the test jumper installed, then the AFM won't make it turn on either.
- http://www.4crawler.com/4x4/CheapTricks/AFM/index.shtml
But it is another thing that makes the CO relay turn on when the engine is running. If the CO relay is not turning on with the test jumper installed, then the AFM won't make it turn on either.
#13
- http://www.4crawler.com/4x4/CheapTri...ORelayLocation
#15
Thanks. Excellent explanation. I was just going to take out the relay but then some wet stuff started to fall from the sky. I'll just kick it until this rare socal phenomena ends. I'll let you know what happens.
#19
I had the exact same problem on my 86 turbo 4runner. I converted it to a regular 22re. Never did find the problem I checked all the stuff you talked about. But mine seemed to be intermitent about the time I think I had stumbled upon the problem it would mess up again. I finally gave up on this truck and wired a jumper off the cigerette lighter.