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> L-Jet issues, Injectors not injecting
echocanyons
post Feb 8 2009, 12:20 PM
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Hello,

I have a 75 1.8 with L-jet, it seemed to be running fine aside from a possible bit of a hard cold start.

I was driving it and suddenly the engine died, I looked in the engine compartment and the negative battery cable had popped off.

It has getting good spark.

The injectors do not pulse at all and can't seem to figure out the root cause of the problem.

I have tested the dual relay and have installed a new resistor pack, thinking that this was the issue, but still no luck.

I do know the fuel pump is working (I did not test the pressure) the AFM seems to be functioning.

The white wire connected on the same side as the condenser on the coil.

Could the battery cable thing have toasted the ECU?

How exactly do the injectors get the signal to fire? They are all batch fire right?

Are the injectors pressure driven in as much as they will not fire if there is not enough pressure or will they drip fuel?

I don't remember but do the injectors "click" when the recieve the electrical signal to fire?

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echocanyons
post Feb 14 2009, 08:35 PM
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So after testing a few more things I nailed down the problem to the ECU, thanks to some great members here, BTW thanks a ton treemn and ZX-niner, I was able to get an extra and some spare parts.

I plugged it in and it fired right up.

My guess is that it was getting ready to croak for a while as there is no more having to let it crank for a while before it starts, it fires basically on the first time.

I understand that these things are pretty robust and don't usually go bad but in this case it did, so if all else fails L-jet owners, check your ECU.

A big thanks to McMark too for going out of his way to help me.
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Posts in this topic
echocanyons   L-Jet issues   Feb 8 2009, 12:20 PM
echocanyons   If the injectors are fired by the breaker points (...   Feb 8 2009, 01:23 PM
underthetire   You are correct, batch fire. Injector points will ...   Feb 8 2009, 05:35 PM
9146986   If it has the original AFC injection, there are no...   Feb 8 2009, 05:43 PM
echocanyons   Yes its L-jet, stock so no injector points. I was ...   Feb 8 2009, 06:57 PM
Dave_Darling   That white wire that hooks up to the (-) terminal ...   Feb 8 2009, 07:10 PM
ClayPerrine   There is an additional power wire that comes from ...   Feb 8 2009, 09:04 PM
echocanyons   I examined all of the wires and connections and di...   Feb 8 2009, 09:27 PM
r_towle   Check wire going from the positive side of the bat...   Feb 8 2009, 09:37 PM
echocanyons   Will do, I think I have a good basis to start. ...   Feb 10 2009, 10:02 AM
echocanyons   So after testing a few more things I nailed down t...   Feb 14 2009, 08:35 PM
echocanyons   So I dissected the bad ECU to try and pin down the...   Feb 14 2009, 08:38 PM
echocanyons   on second thought is this corrosion on the left si...   Feb 14 2009, 08:47 PM
sean_v8_914   looks like old solder flux to me   Feb 15 2009, 09:36 AM
zx-niner   Glad to hear my old ECU worked after sitting for a...   Feb 15 2009, 09:49 AM
jim_hoyland   Here's a L-Jet test: http://manuals.type4.org...   Feb 15 2009, 02:39 PM
jkeyzer   My guess is that the battery cable falling off cau...   Feb 15 2009, 04:58 PM


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