92 Isuzu PU 2.6L AT - WON'T START! HELP!

VALDOSTAGURU

MEMBER
1992 ISUZU

92 Isuzu PU 2.6L AT

History:

Engine had bad piston, I decided to buy a used engine that had 87k miles on it. Got it for a good deal. Ordered it, got it in, Would not start. Replaced fuel pump when fuel was not getting to the engine.

Fine.

Issue:

It will not start. When we spray ether in it, it fires up for a second (literally) but does not stay running. It appears to burn off the excess ether in the engine. We are getting fire and gas going THROUGH the Fuel Injector tree and back to the return line to the tank.

Question:

Are the injectors spraying the gas? If not, is there a way to clean them without replacing them? If so, should I spend the money on trying to rebuild the injectors (new seals and cushion gaskets) which cost about $80 or should I replace every injector which is $80 a piece?

Are the injectors the problem at all? All fuses, relays check out. I do not have a computer code checker to check the codes but it ran before I took the engine out.

*REVISION* the engine I bought did not have alot of the electronic sensors/modules etc, all of them came off the OLD engine*****

4 Replies

MRTRDRVR

MEMBER
20 POSTS

First check fuel prssure at the rail. Though you may be getting fuel up there now your filter could be restricting the amount.
Did you use your old injectors or did the new engine come with them? Swap out injectors?
They do make injector cleaning units but since you can't drive your car to the shop. Also I've seen portable smaller ones for a couple hundred dollars. I doubt thats the problem unless all injectors failed at once. Doubtful but you could give it a shot.
I don't know enough about fuel injection to intelligently talk about why your injectors aren't firing. Are you sure you have everything hooked up right? Apparently since the engine runs on ether the spark is ok so you must have a problem with a sensor or something (maybe ecm) that tells when to fire the injectors.
Sorry can't be more help.

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Sunday, March 18th, 2007 AT 8:52 AM

VALDOSTAGURU

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3 POSTS

First check fuel prssure at the rail.

How do I do that?

Did you use your old injectors or did the new engine come with them?

I am using the injectors that came with the new engine. Should I try swapping them BEFORE I buy NEW ones?

Are you sure you have everything hooked up right?

How do I check? Should I go ahead and buy a manual that pertains to my truck? DO they make one that is SPECIFIC to my truck?

THANK YOU SO MUCH FOR RESPONDING!

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Sunday, March 18th, 2007 AT 7:10 PM

MRTRDRVR

MEMBER
20 POSTS

There should be a schrader port, (looks like a valve stem to air up your tire) on the metal fuel inj rail. Take off the cap and attach the gauge there.
Before I bought new ones I would install the ones out of my old motor. That should eliminate or confirm whether it is the injectors causing problems.
The book might give you more troubleshooting procedures but it will be up to you and your memory to ascertain if the correct wires are attached to the correct sensors, connections, injectors, etc.

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Tuesday, March 20th, 2007 AT 12:46 PM

VALDOSTAGURU

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3 POSTS

What kind of gauge do I attach to the schraeder port?

*yes I am clueless*

I do not have memory of which wires go to which injector. Can the book have this info?

*ill have $$ thursday in order to purchase the book and gaskets for the intake mani*

thanks for your help

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Tuesday, March 20th, 2007 AT 1:35 PM