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Why is it flooding?

Tiny
JJGREEN73
  • MEMBER
  • 1994 ISUZU TROOPER
  • 175,000 MILES
1994 Isuzu Trooper 3.2LSOHC 4door, AutoTrans, has New injectors(6), Plugs(6) & wires, ECU, coils(3), Crank Sensor, Timing belt, water pump, radiator, O2 sensor, Speed Sensor, Idle Air Control, Pressure Regulator, Ignition control module, fuel filter, pvc, Air Intake Temperature sensor. I had all the stuff replaces before daughter headed off to College and was driving fine, after 4000 miles trooper just died while driving down road.
I replaced fuel pump, ignition switch, and EMC. When I turn, the key I can hear fuel injectors spray but will not start due to flooding (it does have spark). Sometimes it will start for about 2 sec then floods out. Fuel pressure gauge shows 39-40lbs. What else could it be? I have replaced so much stuff, I think I got fix it to get my money out of it just in parts.
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Friday, March 9th, 2012 AT 2:09 PM

10 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
You did not mention Engine Coolant Temperature sensor and if it has not been checked, do so.

Check the injector circuit for shorting to ground which would cause the injectors to be opened fully when ignition is turned on.
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Friday, March 9th, 2012 AT 3:27 PM
Tiny
JJGREEN73
  • MEMBER
  • 4 POSTS
I'll check/replace Engine Coolant Temp. Sensor today and see where that takes me, checking for ground short that going to take me while. I'll keep an update and post findings.
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Saturday, March 10th, 2012 AT 9:13 PM
Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
We'll be here. Let us know what you find out.
KHLow, can you post the engine performance schematic for him? Isn't letting me see any of the schematics for this vehicle.
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Monday, March 12th, 2012 AT 11:01 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Here they are.

Mike, what problem are you getting with Mitchell1? Did you install sg view?
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+4
Tuesday, March 13th, 2012 AT 1:48 PM
Tiny
JJGREEN73
  • MEMBER
  • 4 POSTS
I gave up on it and had it towed to local mechanic shop. I'll pay someone to trace out the wires and test them. I'll post the findings or the link to cragslist where it getting sold for parts. LOL

Thanks
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Tuesday, March 13th, 2012 AT 7:35 PM
Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
Mit1 is picking and choosing which schematics for which vehicles I get to see and which I don't.
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Wednesday, March 14th, 2012 AT 9:48 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
For wiring problems, patience is one of the most important factor.

Good luck.

Something must be wrong somewhere with Mit1. Let Mike knows, maybe he can help.
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Thursday, March 15th, 2012 AT 2:00 PM
Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
I've told him about it a few times.
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Friday, March 16th, 2012 AT 2:32 AM
Tiny
JJGREEN73
  • MEMBER
  • 4 POSTS
--Update--

Got 94 Trooper back from shop, some how the timing jumped. Had them redo the timing and it fires right up and runs. I did notice that the 'CheckTrans' light is flashing and Alt is only at 10 volts. I am hoping that a new Alt will fix the Trans light. I drove it home and shifted fine until battery started to discharge then started to shift harder. That where I am at now.

Thanks everyone for the help!
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Friday, March 23rd, 2012 AT 9:08 PM
Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
Yeah, get the battery fully charged, Check the alternator output and change it if necessary, then see what happens.
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Saturday, March 24th, 2012 AT 4:14 AM

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