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L- Injectors not firing
Posted: Mon Sep 12, 2005 4:23 pm
by Longbeach412
Howdy all, been busy getting the top end done on my 74 and a bunch of other life crap
. Got as far as mounting the engine and getting her to crank but no running. The injectors are getting juice and gas, but not pulsating. It looks like a wiring thing to me, so I checked all the connections and all seems ok, to me! Any clues what could cause such a problem? Thanks for any thoughts. Now, off to search the list files.
Posted: Mon Sep 12, 2005 5:37 pm
by raygreenwood
They get their impulse from the distributor/coil. Check your connections carefully. Also, check your grounds very carefully. They can possibly be getting juice (+)...but no negative. Ray
Posted: Mon Sep 12, 2005 6:46 pm
by Longbeach412
ok, I already checked the 2 wires going into the case under the throttle body. But there is a long ground wire coming out of the right side, is it supposed to go to the gas heater solenoid on the far left side?
(Thats what you get when you let your mechanic do the work
at least the guy is honest about it.)
Posted: Tue Sep 13, 2005 8:59 am
by Longbeach412
They get their impulse from the distributor/coil.
Hmmm........also on L jet without trigger points?
Posted: Wed Sep 14, 2005 9:06 am
by raygreenwood
D-jet has totally seperate triggers. Its a different set-up altogether. The L-jet takes a timing impulse from the coil to batch fire all of the injectors at one time. Ray
Posted: Wed Sep 14, 2005 11:19 am
by Longbeach412
I dug up a Haynes for the early Vanagon and it has on P. 83 a display of the ECU and the harness. There is a wire with a single spade connector labelled "to ign coil", that must be the link, and it is the one I wondered about earlier. Plugged it into the +ve side of the coil. Unfortunately no change and still no pulse. I'll check the ECU relay next. Thanks for the response Ray.
Posted: Wed Sep 14, 2005 2:06 pm
by Longbeach412
Got it! it goes to the negative side of the coil, not the positive.
Posted: Wed Sep 14, 2005 4:25 pm
by vwbill
Wahoo, you got her to run!!! That's so great! How does she sound? Bill
Posted: Wed Sep 14, 2005 7:42 pm
by Longbeach412
At the start, sounded bad, then I eleminated the air leak at the intake runners and she started hummimg beeeeutifully man
Posted: Wed Sep 14, 2005 9:07 pm
by vwbill
That's so great!! It's funny how the little air leaks add up and how fast you can make the engine purrr! I love that rev of the pancaker!! I'll bet once you start playin with the settings and fine tunin she'll be a screamer! Glad you got her running! Congrates! bill
Posted: Thu Sep 15, 2005 5:35 am
by Longbeach412
Bill, with a valve job, new rings, and a K torque converter (couldn't find a Z), I can't wait to see how it drives now. Will find out soon (within 2days).