Fuel Injection Problem

[inno]

Greetings,

I posted a message on the Esprit group earlier pertaing to this problem with no response. Perhaps someone here can give me a hand. Let me get to the basics and maybe some
kind soul can help me before I tow the car to a shop.

1. I just installed the engine after a removal. Was running perfectly
before
the engine removal (removed engine to do a bunch of preventative
maintenance as well as repair the fuel tanks).

2. The car won't start.

3. The car will start if I manually inject fuel through my wet nitrous
injector.

4. I have determined that the injectors are not firing.

5. Fuel pump is functioning and rail appears to be pressurized (the
rail
supplies fuel to my wet nitrous system).

6. The O/W wires that go from the fuel pump relay to the injectors are
at 9.8
volts.

7. All grounds have tested fine.

8. The fuel pump relay buzzes when I turn on the ignition. I bypassed
the
relay (also swapped out relays, no help).

My main question. Why aren't the injectors firing? What should I try
next to
troubleshoot this problem? I have a Fluke meter, the schematics, and
beer.

I assume that the flywheel sensor is working since the engine will run
with
fuel manually supplied.

If anyone can point me in the right direction I would greatly
appreciate it. I
would hate to admit defeat and have to trailer the car 100 miles to
the
nearest Lotus pro.

Thanks much,

Pete
90 SE

[Dr.Hess]

I think you are going to have to do a Freescan thing and check the codes. Injectors get power all the time and are turned on by ground. If you are sure your injectors are not firing (I like to pull the plug and look down the hole while the assistant cranks the motor. Nothing like a visual) then it is a wiring issue or the ECU is toast.

Dr.Hess

[arium]

Since the engine was removed and therefore the various wiring harnesses had their connections split; I'd take a long hard look to see if everything was reconnected. Aside from a positive lock on the ECM I'd look more carefully at the few that live to the right of the engine bay tucked underneath all those air ducts. If you are getting power to each injector it would require two pins (J4D9 and J4D14) to be disconnected for both pairs to go dead. Anythings possible tho.

Often times when they get reconnected a pin or two backs out. My aircon and throttle jack ceased to function one day and it was traced to one of the blades of a connector backing out just a tiny bit.

As Hess mentioned, having a look to see if you're getting a code 65 would help as well. If it's a critical sensor that's preventing the engine from starting Freescan usually reveals it.

Steve

[inno]

Thanks guys. I did plug in freescan and it gave me no readings. I will double check all the connectors. I did a quicky look and all appeared fine but one of the connectors could have backed out.

Thanks

[zhastaph]

I'm not sure about the older vehicles, but on the v8's the ECU will kill the injectors if you try to start the car with the throttle fully open {anti flood}.

It could poss be a prob with your throttle sensor mayb?

[inno]

zhastaph said:

I'm not sure about the older vehicles, but on the v8's the ECU will kill the injectors if you try to start the car with the throttle fully open {anti flood}. It could poss be a prob with your throttle sensor mayb?

Exactly, I checked it out and found 7 volts with the throttle closed (should be < 1). I checked the grounds at the ECU and found them open. Can't trace down where on the engine it is supposed to ground at. Does anyone know?

Thanks