Truck stalled and won't start anymore! FITECH?

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PUDS
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Truck stalled and won't start anymore! FITECH?

Postby PUDS » Thu Apr 20, 2017 1:32 pm

So I recently finished my Fitech install, and everything was great. Truck started every time no problem, ran great, and I had even taken it up and down my road a few times to try it out (not road worthy yet so driving is limited). One time it stalled on me, but I assumed I ran out of gas. Threw in another 5gal jerry can and off to the races again. About a week ago I was playing around, had to move it out of the shop to work on my dad's brakes, and when I went to put it back, it started great as usual, so I went for a quick spin (like 1/4 mile) and it died right in front of my house. It seemed like it was a fuel issue again, so I went to town to get more gas but it didn't help. I had to push it back into the shop, as no matter what I tried, it would crank and not fire.

I've left it for a week or so, knowing I was too mad to get into it. Today I decided to take the battery off of the charger and put it back in to see what would happen. Once again nothing. The truck will crank forever but will not start. There's tons of gas, and it has been running great and starting without issue since the install. The fuel pump is definitely running, so I have no idea why all of a sudden it won't start. Only thing I can think is that something in the ignition, unrelated to the Fitech install may have crapped out. Anybody else had a similar issue?

Kind of bummed as mechanically the truck was thought to be ready to go, I was prepping myself to tackle body work for the first time and now this. Any help would be appreciated.

motcat
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Re: Truck stalled and won't start anymore! FITECH?

Postby motcat » Thu Apr 20, 2017 3:15 pm

The fuel pump is definitely running


But did you make sure fuel was being pushed to the Fietch unit?
- John (aka JR)
1978 Cherokee Chief, Original family owned, Wide Track, QT w/part time kit, 401 bored 0.40, RV cam, Edlbrock Performer, Holly 1850, DUI Dist, 3" Rancho lift, Skyjackers, AM Racing rims, 32 BFG KO2s, BJ's Crossflow radiator, Rust, rust and more rust

nightglide
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Re: Truck stalled and won't start anymore! FITECH?

Postby nightglide » Thu Apr 20, 2017 3:41 pm

Is your fuel pump in line? Do you have a fuel pressure gauge? I went thru 3 in line pumps with my fitech. I'm in the process of installing new tank with in tank pump now
77 J10 360/T18/Dana20
Fitech fuel injection
4" Lift....3" body lift....35" ats

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Stuka
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Re: Truck stalled and won't start anymore! FITECH?

Postby Stuka » Thu Apr 20, 2017 5:51 pm

First two things to always check. Fuel, and spark. One of the two isn't there.
1981 J10 AMC 258 with HEI and Weber 32/36 DGEV Carb, T176, NP208, D44/M23 with 4.56 gears and Detroit Locker, 6" lift, 33x12.50 Cooper STT's, BJ's Offroad Rear Dozer Bumper.
2017 JKU Rubicon Stock
Pevious Rigs: 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ

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babywag
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Re: Truck stalled and won't start anymore! FITECH?

Postby babywag » Fri Apr 21, 2017 7:57 am

On EFI could be any number of things.
It may have fuel & spark, but still not start.

You'll have to do some troubleshooting. Start with basics. Voltage checks, FP check, spark, etc.
If you take gander @ handheld does it show values for all sensors etc. w/ key on engine off?
-Tony
'88 GW (aka Babywag) '90 GW (aka JunkBucket) both fuel injected.

ShagWagon
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Re: Truck stalled and won't start anymore! FITECH?

Postby ShagWagon » Fri Apr 21, 2017 8:08 am

The handheld,shows,fuel,pressure,coming in.

When I installed mine my fuel filter plugged up. But I had been working on gas tank before so a lot of fashizzle came through from the tank.
87 Grand Wagoneer Rebuilt 360 by S&J, Fitech GO EFI 600, Fitech FCC, Skyjacker Hydro 4" lift, BFG AT KO2 30", Dynamax Muffler, MSD distributor, MSD 6al box, Blaster2 coil, ACCEL 8mm wires, .045 gap, Edlebrock perf 4bbl intake, Elgin perf cam, Oil tube mod, Roller rockers, chrome molly lifters, HD alum radiator, Powermaster 150/100 alt, Aluminum HD water pump, Serhills tailgate harness, Cowl screen mod, Evil Twin grab handles, Rstep's custom AMC door lock knobs, all electrical works.

PUDS
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Re: Truck stalled and won't start anymore! FITECH?

Postby PUDS » Fri Apr 21, 2017 12:30 pm

That's what I was wondering about. I have a Walbro pump mounted in the tank, and inline 30 micron filter. Not sure if I have pressure, no gauge but going to install one for sure. Time to start troubleshooting I guess.

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FSJ Guy
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Re: Truck stalled and won't start anymore! FITECH?

Postby FSJ Guy » Fri Apr 21, 2017 12:53 pm

Does your system have a "Clear Flood" mode? Have you tried holding the pedal to the floor while cranking? I know, unlikely to still be flooded after several days, but who knows....

Check your ignition. Looks like it takes the signal from the factory or aftermarket ignition. If using a stock distributor, loosen it and wiggle it back and forth and VERIFY that you are getting spark.

As mentioned, you need fuel, air and spark. You probably have air. You need to check and VERIFY the other two.

Have a helper crank while you verify fuel being sprayed into the throttle body bores.
Ethan Brady

http://www.bigscaryjeep.com

1987 Grand Wagoneer. Slightly longer than stock.

PUDS
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Re: Truck stalled and won't start anymore! FITECH?

Postby PUDS » Fri Apr 21, 2017 1:02 pm

So just checked the fuel filter I mentioned above and it's clean as a whistle. When I had the work done for adding the pump to the stock tank, they cleaned the tank as well, so I assumed that wouldn't be the issue. I did find one of the wire on the coil (one I tapped into for the Fitech) was a little loose on the coil, but I pinched it tighter and it still won't fire.

I scanned through the dashboard on the Fitech handheld while cranking and everything seems fine, the fuel pump is going to 100% duty cycle, its creating vacuum, etc, however the one thing that I am not sure about is the Fuel Injector Duty Cycle %. This reads 0 no matter what. I would think that this should be reading something other than zero to allow the injectors to actually spray. I'll have my wife crank it over tonight and I'll look down inside to see if its spraying fuel, but if the handheld reading means what I think it does, maybe the injectors are stuck or not being told to open? Anybody have a better idea of what that reading on the handheld means?

nightglide
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Re: Truck stalled and won't start anymore! FITECH?

Postby nightglide » Fri Apr 21, 2017 8:47 pm

Not sure about injectors but the fuel pump 100% duty cycle is just telling you the fitech is send a message 100% of voltage to pump.......doesn't mean pump is pumping..........
77 J10 360/T18/Dana20
Fitech fuel injection
4" Lift....3" body lift....35" ats

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Tatsadasayago
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Re: Truck stalled and won't start anymore! FITECH?

Postby Tatsadasayago » Sat Apr 22, 2017 2:20 am

You could go Old School and put a bit of fuel into the throttle body and see if the engine runs briefly.
A timing light or spark plug grounded to the exhaust manifold will tell you a lot as well.

An old rule of thumb: Just because it is new does not mean it hasn't failed®
1977 Cherokee Chief - The Blair Jeep Project III
A collection of parts flying in close formation

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243
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Re: Truck stalled and won't start anymore! FITECH?

Postby 243 » Sat Apr 22, 2017 5:15 am

I realize you have a different system but bad grounds caused me a lot of grief with my TBI after several years of solid and dependable use.
1978 Cherokee NT, 360/T400/QT TBI Injected

nightglide
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Re: Truck stalled and won't start anymore! FITECH?

Postby nightglide » Sat Apr 22, 2017 10:08 am

what is your rpm reading in the handheld when you crank it?
77 J10 360/T18/Dana20
Fitech fuel injection
4" Lift....3" body lift....35" ats

PUDS
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Re: Truck stalled and won't start anymore! FITECH?

Postby PUDS » Sat Apr 22, 2017 12:34 pm

nightglide wrote:what is your rpm reading in the handheld when you crank it?

160 ish. I phoned Fitech yesterday and they walked me through a number of checks. No fuel squirting into TB that I could see when cranking. I ordered an inline FP gauge so I'll throw the on this week and see what's going on. Maybe I fried the pump the first time I ran it dry? It's a Walbro GS342 btw.

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tedlovesjeeps71
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Re: Truck stalled and won't start anymore! FITECH?

Postby tedlovesjeeps71 » Sat Apr 22, 2017 1:01 pm

PUDS wrote:
nightglide wrote:what is your rpm reading in the handheld when you crank it?

160 ish. I phoned Fitech yesterday and they walked me through a number of checks. No fuel squirting into TB that I could see when cranking. I ordered an inline FP gauge so I'll throw the on this week and see what's going on. Maybe I fried the pump the first time I ran it dry? It's a Walbro GS342 btw.

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Can't you crack the fuel line before it reaches the FI and turn the key to verify the pump is moving fuel??


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PUDS
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Re: Truck stalled and won't start anymore! FITECH?

Postby PUDS » Sat Apr 22, 2017 1:19 pm

Yes but don't feel like spraying fuel all over the engine bay. Plus, it'll be hard to tell the difference between 20psi and 60psi I'd think. TB needs thr 58psi or better.

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babywag
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Re: Truck stalled and won't start anymore! FITECH?

Postby babywag » Sat Apr 22, 2017 2:22 pm

PUDS wrote:Yes but don't feel like spraying fuel all over the engine bay. Plus, it'll be hard to tell the difference between 20psi and 60psi I'd think. TB needs thr 58psi or better.

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Removing the fuel line and checking flow it won't build any pressure or very little. Without a regulator it's simply a flow check.
-Tony
'88 GW (aka Babywag) '90 GW (aka JunkBucket) both fuel injected.

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az chip
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Re: Truck stalled and won't start anymore! FITECH?

Postby az chip » Sat Apr 22, 2017 11:29 pm

14-15 psi outside of the injection unit.
'81 Cherokee Chief

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tedlovesjeeps71
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Re: Truck stalled and won't start anymore! FITECH?

Postby tedlovesjeeps71 » Sat Apr 22, 2017 11:37 pm

az chip wrote:14-15 psi outside of the injection unit.


Which could easily be aimed into a container instead of sprayed all over.


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ShagWagon
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Re: Truck stalled and won't start anymore! FITECH?

Postby ShagWagon » Sun Apr 23, 2017 8:29 am

Make sure it's a red milk jug
87 Grand Wagoneer Rebuilt 360 by S&J, Fitech GO EFI 600, Fitech FCC, Skyjacker Hydro 4" lift, BFG AT KO2 30", Dynamax Muffler, MSD distributor, MSD 6al box, Blaster2 coil, ACCEL 8mm wires, .045 gap, Edlebrock perf 4bbl intake, Elgin perf cam, Oil tube mod, Roller rockers, chrome molly lifters, HD alum radiator, Powermaster 150/100 alt, Aluminum HD water pump, Serhills tailgate harness, Cowl screen mod, Evil Twin grab handles, Rstep's custom AMC door lock knobs, all electrical works.


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