 1.8 Ljet overfuels |
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| davesprinkle |
 Dec 30 2007, 09:09 PM
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#1
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Senior Member  Group: Members Posts: 720 Joined: 13-October 04 From: Berkeley, CA Member No.: 2,943 Region Association: None 
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My 1.8 Ljet left me stranded yesterday. I did the usual debug stuff. Turns out the ECU is overfueling the engine. Injector pulsewidths are 10ms to 15ms under cranking conditions. This is roughly 10x what I would expect at startup. Anybody have any suggestions for what might be causing this problem? The airflow sensor maybe?
Thanks for any suggestions you can offer. -dave sprinkle |
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| jesiv |
Mar 29 2008, 10:38 PM
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Senior Member Group: Members Posts: 552 Joined: 5-August 07 From: Pensacola/Milton, Florida Member No.: 7,975 Region Association: Northern California |
I don't quite understand. However, this sounds totally awesome. Do you have pics of what you are describing. I have a 75 1.8 and I am trying to understand what is casuing it to run so rich.
Regards, James |
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| davesprinkle |
Mar 30 2008, 12:10 AM
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#3
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Senior Member Group: Members Posts: 720 Joined: 13-October 04 From: Berkeley, CA Member No.: 2,943 Region Association: None
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Sorry, James, don't have any pics of the damaged pressure regulator diaphragm. The pressure reg is a crimped can, so I haven't seen the puncture. I'm just inferring it from the fact that I've got fuel coming out of the vent line -- the only way this could happen is if the diaphragm is damaged.
If your 1.8 is running rich, I would suggest checking out the airflow meter. It could have been damaged by a backfire, which is a common failure mode. It might also be a cold-start valve that isn't shutting off. You might also want to verify that your fuel pressure is OK. Good luck. -dave QUOTE(jesiv @ Mar 29 2008, 09:38 PM)  I don't quite understand. However, this sounds totally awesome. Do you have pics of what you are describing. I have a 75 1.8 and I am trying to understand what is casuing it to run so rich. Regards, James |
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Posts in this topic
davesprinkle 1.8 Ljet overfuels Dec 30 2007, 09:09 PM
Twystd1 Check your grounds FIRST....!!!!... Dec 30 2007, 09:17 PM kwales If your fuel pressure regulator is sticking, then ... Dec 31 2007, 09:11 AM davesprinkle Thanks for your responses, guys. Ground are OK. ... Dec 31 2007, 09:39 AM Cap'n Krusty FIRST thing to check on a 1.8 is the air flow mete... Dec 31 2007, 09:58 AM
davesprinkle
FIRST thing to check on a 1.8 is the air flow met... Dec 31 2007, 03:37 PM davesprinkle I've finally found the cause of my ljet fuelin... Mar 29 2008, 12:59 PM type47
A puncture in the pressure reg diaphragm
now ... Mar 29 2008, 07:02 PM davesprinkle Thanks for the kind words, but I can't claim a... Mar 29 2008, 07:41 PM Cap'n Krusty That's not all that uncommon on Vanagons, BMWs... Mar 29 2008, 04:05 PM davesprinkle Yeah, thanks for the support, Cap'n. Wanna se... Mar 29 2008, 06:56 PM |
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