bank #1@#2 lean - Engine Troubleshooting


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bank #1@#2 lean

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Auto Repair Home>> Automotive Repair>> Engine Troubleshooting

toolman0007
User

Jun 18, 2013, 1:32 PM

Post #1 of 5 (1516 views)

bank #1@#2 lean	Sign In

ok I have a 96 crown Vic 4.6 90.000 miles. check engine lite on scanned tells me bank 1 and bank 2 running lean. with in the past year new front exhaust pipes with converters and all 02 censers have been replaced. as well, at times more when it's cold out when started I get a whistle. when it's warm out still whistles but goes away once it's up to operating temp any one have any ideas .

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 18, 2013, 3:36 PM

Post #2 of 5 (1496 views)

Re: bank #1@#2 lean	Sign In

You've got a vacuum leak somewhere that needs to be found. Look closely at the PCV tubes and all the large vacuum connectors. They tend to suck a hole when running which is hard to spot with the engine off. Try to follow the hissing sound to it's source.

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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

toolman0007
User

Jun 18, 2013, 4:48 PM

Post #3 of 5 (1472 views)

Re: bank #1@#2 lean	Sign In

yes I have checked all the vacuum line and hoses. any thing above 60 degrees I get no whistle. and when it is present it's just so hard to tell where it's coming from. fairly loud seems louder from under the car not raised up. was told converters could have a faulty pinch weld, and explains why it tends to go away when fully warmed up. have to wait till it starts to whistle again to check seams. more concerned about it running lean and the check engine light on

Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Jun 18, 2013, 4:52 PM

Post #4 of 5 (1471 views)

Re: bank #1@#2 lean	Sign In

Dirty MAF will cause lean codes to pop up on those too.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

toolman0007
User

Jun 18, 2013, 5:29 PM

Post #5 of 5 (1462 views)

Re: bank #1@#2 lean	Sign In

will check that out thanks,

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