Post turbo installation, No start.

ZacD311

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I have a 93 7.3 idi that I just turbo'd with the banks sidewinder kit. I also changed the entire glow plug wire harness and put all new motorcraft glow plugs in. The truck has been sitting a total of 3 weeks while I installed the turbo system and exhaust system. Now I know you have to move the crossover fuel line on the back of the engine, but I did that 6 months ago when I upgraded the injectors because I knew I would have to when I got the turbo kit. The truck ran great up until I parked it to do this. I always run fuel treatment in both tanks, both tanks are full, fuel filter only has 2000 miles roughly on it, oil was just changed a week before I parked it. So now that i gave some history, after i got done with the installation, i started the truck(which two 15 second key holds), it started and idled rough for about 10 seconds and cleared right up. Smoke looked great, idled great for about 10 mins, so i backed it out of the garage and it went to high idle for about 2 minutes and then just shut off. Went to start it up again and nothing, no smoke out the exhaust while cranking. So i had my buddy turn it over while bled the fuel filter and it was shooting straight full for about a minute with no air. It was late so i called it a night, went back out the next day and tried again.( truck was plugged in all night and had battery tender on it) It fired right up, idled for about 10 mins again shut off. Wouldn't start again. Took a test light to the two plugs on the Injection pump and touched the positive battery terminal and they all lit up.
Is there anything else i should check that might be a simple dumb mistake? Mind you that when i installed the turbo kit, fuel system was never touched, the only real thing that has changed is the GP harness. Is there something else in the harness that would allow it not to start? I wont be working on it again till Saturday due to the weather gonna be in the 10's the next two days. I will be putting a new fuel filter on then. Any advice would be awesome as this was my daily driver, and the wifes car is really getting on my nerves with traction control BS haha. Thanks!
 

icanfixall

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Welcome to the forum. It sounds to me like you mixed up the two wires on top of the injection pump. Those wire connections are two different sizes and they do different jobs. The wire close to the radiator is the power to the fuel shutoff. the wire close to the firewall is the cold internal advance to the pump. It also feeds power to the fast idle solenoid. When the engine coolant reaches 120 degrees the power is shut off to the fast idle and internal advance by the temp sender located behind the thermostat housing. To test what I have posted try running a jumper wire from any battery positive terminal directly to the large wire connection nearest the radiator on top of the injection pump. You can statr the engine form inside as usual but will not be able to shut it off by the ignition key inside.you have to remove the jumper. Hope this helps.
 

laserjock

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Motion carried.

No seriously, sounds like it's killing it when it would be coming off high idle. Explains why it starts cold. If you have a real temp gauge watch it. I bet it dies around 120-130F.
 

IDIoit

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Motion carried.

No seriously, sounds like it's killing it when it would be coming off high idle. Explains why it starts cold. If you have a real temp gauge watch it. I bet it dies around 120-130F.
you mean, inbetween the N and the O? lol
 

ZacD311

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Thanks for the advice! Had those two wires backwards, swapped them and she fired right up with no hesitation and ran for about 30 mins or so without a hiccup! Glad it was something simple.
 

icanfixall

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Sucess... The factory made those plugs different sizes just so you can't place them on the wrong connections. Not being able to actually see your connections keeps me from saying someone may have cut off the ends thinking they did the right thing. At least you now have a running engine past 120 degrees coolant temp.
 

FarmerFrank

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Hahahaha that's a trick I like to do to the new guys at work on Hmmv's. Good way to figure out who the bright ones are and who the not so bright ones are.
Glad you got it straightened out.


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