Bank 1 Rich;Bank 2 way lean???
03-15-2005, 04:36 PM
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Bank 1 Rich;Bank 2 way lean??? Just got my 99 TA, TR224, long tubes, catback, on a tech two. The car has no tuning, but its showing Bank one 25%rich, bank 2 65% lean? The car doesnt have any codes, or noticable exhaust leak. What can cause this condition? Bent pushrod? Collapsed lifter? Broken valve spring? The car has not been "hot rodded" since the cam install about 200 miles ago, since it had zero tuning. Any advice on what to look for is greatly appreciated!!
03-15-2005, 07:37 PM
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i can see it being a lil rich after a cam install but that excessive. does the car have a misfire cause that would be why bank 2 is reading lean. try and reset the computer
03-16-2005, 01:28 AM
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i already did a crankshaft relearn, because I was getting a camshaft and crankshaft position codes. After I did the relearn, the codes are gone, but the car is still running like dirt. Bucking and missing. I am going to be swapping the o2's out and see if that helps. Anyother suggestions? Thanks Guys!
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03-19-2005, 03:00 PM
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update...changed the o2's and made sure there is no exhaust leaks, and car is still bucking and missing and hesitating, and the code p0336 came back, after I already did a crankshaft relearn. Im totally stumped!
03-19-2005, 04:41 PM
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Originally Posted by wicked383bird
update...changed the o2's and made sure there is no exhaust leaks, and car is still bucking and missing and hesitating, and the code p0336 came back, after I already did a crankshaft relearn. Im totally stumped!
03-19-2005, 06:47 PM
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The following conditions may cause this DTC to set:
- Poor connections: Refer to Intermittents and Poor Connections Diagnosis in Wiring Systems.
- Crankshaft reluctor wheel damage or improper installation.
- The sensor coming in contact with the reluctor wheel.
- The engine running out of fuel.
- If the crankshaft rotates backwards, this DTC will set. This condition is only with vehicles equipped with a manual transmission. This condition can occur when a vehicle is on an incline and the clutch is released and an engine stall occurs.
• Excess crankshaft end play causes the CKP sensor reluctor wheel to move out of alignment with the CKP sensor. This could result in any one of the following:
- A no start
- A start and stall
- Erratic performance
check these things
- Poor connections: Refer to Intermittents and Poor Connections Diagnosis in Wiring Systems.
- Crankshaft reluctor wheel damage or improper installation.
- The sensor coming in contact with the reluctor wheel.
- The engine running out of fuel.
- If the crankshaft rotates backwards, this DTC will set. This condition is only with vehicles equipped with a manual transmission. This condition can occur when a vehicle is on an incline and the clutch is released and an engine stall occurs.
• Excess crankshaft end play causes the CKP sensor reluctor wheel to move out of alignment with the CKP sensor. This could result in any one of the following:
- A no start
- A start and stall
- Erratic performance
check these things
03-19-2005, 07:04 PM
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Originally Posted by wicked383bird
Just got my 99 TA, TR224, long tubes, catback, on a tech two. The car has no tuning, but its showing Bank one 25%rich, bank 2 65% lean? The car doesnt have any codes, or noticable exhaust leak. What can cause this condition? Bent pushrod? Collapsed lifter? Broken valve spring? The car has not been "hot rodded" since the cam install about 200 miles ago, since it had zero tuning. Any advice on what to look for is greatly appreciated!!
Did this all start after the cam install? If so maybe the cam gear was installed one tooth off.
John
03-19-2005, 10:13 PM
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Originally Posted by oange ss
clogged/failed injectors
03-20-2005, 01:32 AM
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this happened shortly after the cam install. After the cam install everything was fine, I took it up to get tuned, and there was a problem with the PCM in the car. We swapped the PCM out for a brand new GM PCM, and a new file, and a funky problem began. It would run really lean, and no matter what amount of fuel we added, the AF wouldnt change. When changing the power enrichment tables, the idle AF would change too!! Drove the car back home (at this point with no tuning, no codes, no bucking and missing) Two days later, this bucking and missing began. I did a crankshaft relearn with a tech two, and the codes were gone, but the bucking and missing were still there. Bank one is rich, bank two is really lean. I cant figure out what the problem is. Now the crankshaft code is back again. So the camshaft install is fine, but something else is causing the problem. Something that is making bank two really lean, 65% lean. No exhaust leaks are present, and its got new o2's...Im going to be changing the header gaskets just incase. Is there anyway to check if the injectors are ok? Thanks guys, very much appreciated
03-20-2005, 02:46 PM
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I know this is a long shot, but I once had a pin on the PCM connector get pushed up into the connector to where it was not making contact and caused some codes to be set, just an idea!
Dan
Dan
03-20-2005, 08:59 PM
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Update...PROBLEM= Two wires on the harness that runs from the PCM to the Crankshaft position sensor were burnt, due to the header. One wire was from the CSPS, and the other from the o2. Fixed both, hesitation and bucking is now gone! I need to see if that is what was causing the "lean" conditon on that side. Keep you guys updated!
