Vacuum Leak in the Inlet Manifold

Tiny
ANTKNEES
  • MEMBER
  • FORD EXPLORER
I have a 1996 Ford Explorer (UN) Auto V6 (80,000km), We have the engine Management light come on and my mechanic tells me it says it is running lean on bank one, previously it was on bank 2 but we changed the inlet manifold as the original was warped. We are still getting the same message it is on the back 2 cylinders. Both the mechanic and I have run out of ideas as to what it could be, he has checked all the hoses, replaced the o-ring between the two manifold pieces. Do you guys have any idea or anybody else out there? It would be great to get a fix as we have spent AU$1770 on it already with no luck, plus the exchange manifold at AU$385.00
Wednesday, January 31st, 2007 AT 11:21 PM

8 Replies

Tiny
TAURUSWHEEL
  • MECHANIC
  • 718 POSTS
What codes are you getting? Is that a plastic manifold?
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Thursday, February 1st, 2007 AT 2:26 PM
Tiny
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Yes it is the plastic manifold, not sure what the codes were, but the mechanic did say that it was saying that it was running lean on the left bank. It originally had the o-rings between the upper and lower manifold pieces crack and that was replaced. I think the codes were 170.
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Thursday, February 1st, 2007 AT 11:21 PM
Tiny
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I gather from the non response that it may have stumped a few people. The mechanic didn't say what the code was, just that it was telling him it was running lean at the back. The injectors were trying to compensate by running longer, the front ones for 3millisec and the back for 5 millisecs or approx. If anyone can help it would be greatly appreciated
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Friday, February 9th, 2007 AT 7:18 AM
Tiny
TAURUSWHEEL
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96 is probably a 4 digit code, check one of the above threads for info on lean issues, p0174 thread. You need to know the code and post it here so someone can give some ideas. As for non-response, speaking only for myself, I don't regularly come on this site, only ocassionally. For most issues concerning engine management, unless your mechanic is well-versed in it. It usually is wise to get it to a, in your case, Ford dealer who can run the necessary tests to figure it out. Don't replace parts unless it's called for, a waste of $$$$ and usually the issue is still there. Sometimes the dealer seems high-cost, but they have the equipment to run it down, and sometimes it's not that much compared to people just taking shots in the dark.
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Friday, February 9th, 2007 AT 5:27 PM
Tiny
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The mech is using a carman reader and it didn't give a 4 digit code. Thankyou for your response, I was just thinking that it was a long time between response. Again thank you for your help.
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Sunday, February 11th, 2007 AT 4:39 PM
Tiny
SERVICE WRITER
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There was 116 pages of unanswered posts last month. Our resources are limited. We volunteer out time.

Here is the post Tauswheel refers to made by Chris.
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Sunday, February 11th, 2007 AT 5:20 PM
Tiny
ANTKNEES
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Sorry I didn't mean for it to sound as though I was being pushy or anything, and I apologise to everybody out there, but after having no car for a while, I was getting desperate foir some answers. SO again I apologise. I was thinking that it was like the scout forum page where there is constant chatter by every one.
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Sunday, February 11th, 2007 AT 6:18 PM
Tiny
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MY apoligies, I never put the link, didn't mean offense either.

This is the post:

http://www.2carpros.com/forum/p0171p0174-ford-40l-common-causes-testing-and-fixes-vt27348.html
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Sunday, February 11th, 2007 AT 6:34 PM

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