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Old 02-19-2011, 03:40 PM #1
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3vze EFi fuse goes every 5 minutes and car wont start now.. HELP

Hi guys. I have a major problem with my 1990 4runner with the 3.0 v6 engine. It startet to bog and lose power when I was pulling a heavy trailer today . And soon after it blew the EFi fuse under the hood and the engine died. I put new 30amp fuse in and drove 5 miles then it blow agin.. and again and again , i let the trailer go and drove it under no pressure and it started again to bog and loose power.. ( like it was running out of gas.. ) and then no power = fuse gone. , I repeated this 10 times ( 10 new fuses ) to bring the car home.

But now last time it started boging and looseing power and then dying the fuse did not blow... It is still intact but the truck will not start , first when i turn the key it did cough alittle but now it has no life at all

Has anyone had this problem before ??
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44" 1991 Toyota 4Runner Truck , solid front axle and four link , Rear axle moved 10" back ,5.71 Gears + Arb locker rear ,ESAB front , Di ck Cepek Kevlar FC 44" tyres on 15 x 18" wide Wheels , Artic trucks fender flares , 4" lift , cut fenders , K&N Intake,Full 3" Exhaust with Headers,Offroad Skidplate ,
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Old 02-22-2011, 07:28 PM #2
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I get spark.. that is not the problem ,



When i

switch the key position to on or start i dont hear the fuel pump..

can the pump it self just die like this , blowing fuses or is it some wires ?

I dont think the ECU is fried becorse the check engine light goes on when i put the key to on position..
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44" 1991 Toyota 4Runner Truck , solid front axle and four link , Rear axle moved 10" back ,5.71 Gears + Arb locker rear ,ESAB front , Di ck Cepek Kevlar FC 44" tyres on 15 x 18" wide Wheels , Artic trucks fender flares , 4" lift , cut fenders , K&N Intake,Full 3" Exhaust with Headers,Offroad Skidplate ,
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Old 02-23-2011, 09:25 AM #3
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Okey i did the "cheap trick" fuel pump jumper in the Timing and Diagnostic Check Connector location in the hood.

Toyota 4Runner and Pickup: Cheap Tricks



And the fuel pump didnt start.

That tells me the problem is in those things

*First off fuel pump
*The wiring to the fuel pump
*The circuit opening (CO) relay is NOT functioning to some degree
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Old 02-23-2011, 09:26 AM #4
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I found out what was wrong.
The wires for the fuel pump had been rubbing side the exhaust and melted.

the truck runs just fine now.

Thanks for all the Help guys.............................................. ..............................................

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