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Terry Kangas - 13 Jul 2006 12:24 GMT

To review,
1988 xj6 3.6 engine, quit and wouldn't restart. Towed home. Had
spark at #1 cyl same time as comppresion. Put in new plugs, wires, dist cap
& rotor anyway. (they were pretty old) #6 cyl was FULL of gas, me thinks,
bad injector. replace injector. Drop oil, had approx one gallon of gas in it
!!! Dry out cyls with compressed air, crank it over, no fire. Pull plugs,
all plugs soaked with gas !! Anybody got an idea on where to look next?

New development, got most of the gas out of the cylinders, put the spark
plugs back in, and unpluged all the wires to the injectors. Fired right up
and ran for a secound til the gas was gone, fired it up again on starting
ether. So it appears that it is just getting too much gas. Getting closer, I
think?

Replaced fuel regulator, no help. Injectors have a continuse 12 volts to
them. My parts guy says there is a resistor pack in there that could be bad?
The temp sensor for the injectors reads zero resistance, but I put a 100k
resistor in line and that didn't help. Saw a ford Maverick on Craigs list,
getting tempted!!!

terry

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WayneC - 13 Jul 2006 15:47 GMT

> To review,
> 1988 xj6 3.6 engine, quit and wouldn't restart. Towed home. Had
[quoted text clipped - 17 lines]
>
> terry

Are there any fault codes?
Haven't the time to help today(or the expertise, really), but take a look at
the online XJ40 book at

http://www.jag-lovers.org/ebooks/bookindex.php?Vbook=xj40

...especially section 10.15 and section 11.

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Don Young - 14 Jul 2006 04:01 GMT

> To review,
> 1988 xj6 3.6 engine, quit and wouldn't restart. Towed home. Had
[quoted text clipped - 21 lines]
>
> terry

I have no specific idea what your problem might be. The following
description is for my 1990 4.0 but I think is the same for your engine. The
injectors are all connected to +12volts when the ignition is on. A meter or
test light with one lead connected to ground should indidcate 12 volts at
all injector terminals when the ignition is on and the engine is not
running. The injectors are all opened when the engine control computer
grounds one terminal of all the injectors. In other words, the injectors are
switched on the ground side, all at the same time. The "NOID" injector test
lights plug in to the injector harness and are real handy to tell if the
injectors are being pulsed. Be sure you get one which fits your injector
connector.

You can disable fuel delivery by pulling the fuel pump relay. On my car it
is above the glove box, on some it is in the engine compartment.

Excess fuel could be caused by too much pressure. Since you replaced the
regulator, another cause might be a blocked return line from the regulator
back to the tank. It would be good to check the pressure but this takes some
special fittings and a gauge.

The injectors could be leaking, but all at the same time seems very
unlikely.

The injectors could be opening for too long. This could be caused by wrong
data to the computer. I do not know what the normal resistance for the
temperature sensor is but it is not zero ohms. I would explore this further
and trouble codes should help.

I would not suspect the resistor pack, if one is fitted.

Of course, the wiring itself could have an open or short somewhere.

I hope some of this may help.

Don Young

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