LS1 running rich
10-31-2008, 02:31 PM
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LS1 running rich Hi i have a LS1 in a GD cobra kit car in the UK, im having some issues with one bank running very rich, and a high tickover, if i unplug the TPS the revs drop and it idles fine but still runs rich ( i think), i first had a bank 1 sensor one code so i changed the sensor, then changed all the plugs as they were fouled up. on tick over with the TPS plugged in the Ignition advance on cylinder 1 is 41* ( which i guess raises the revs) with it unplugged it drops to 18* or so , both 02 sensors seem to be working ok, anyideas? getting stuck a little thanks
10-31-2008, 07:20 PM
#2
Hmm im having the same problem above 25% throttle but with a carburetor on a single plane intake and i'm stumped. Mechanically i can find nothing wrong all cylinders are withing 2psi of compression of each other too. I have a brand new dual wideband setup for monitoring too.
How rich are they running? Like say one bank is 12:1 and the other is 13:1?
How rich are they running? Like say one bank is 12:1 and the other is 13:1?
11-01-2008, 07:11 AM
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not sure yet, i took the car for SVA (a test to register the car on the roads) and it failed emmisons dumping unburnt fuel down bank 2, the car felt fine on WOT but on part throttle it seems to hesitate, so i chaned the 02 sensor hoping that would solve the problem. but when i rev it it still puffs out a little black smoke.. maybe this is carbon in the exhaust ? maybe i should do a compression test... anyideas? thanks
11-02-2008, 06:39 AM
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Revving it usually always produces black smoke. I'm going to pull my rockers and check for a collapsed lifter although i have no abnormal sounds and im pulling my plugs to see what they look like. Mines a perfect 13.4/.13.4 at idle but cruising is like 13.2/12.6 and its making me crazy.
11-02-2008, 07:24 AM
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Hi i have a LS1 in a GD cobra kit car in the UK, im having some issues with one bank running very rich, and a high tickover, if i unplug the TPS the revs drop and it idles fine but still runs rich ( i think), i first had a bank 1 sensor one code so i changed the sensor, then changed all the plugs as they were fouled up. on tick over with the TPS plugged in the Ignition advance on cylinder 1 is 41* ( which i guess raises the revs) with it unplugged it drops to 18* or so , both 02 sensors seem to be working ok, anyideas? getting stuck a little thanks
