Over Fueling
Thread Starter
On The Tree
Joined: Nov 2004
Posts: 107
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From: UK
Over Fueling 
Have my TVR running now with chipped LS6 (via Hot Rod Lane),gooing really well but looks like it is really over fuelling big time - going through go juice real fast and only running in - exhaust very balck - way too rich.
HRN guys say ecu prog shoul be fine and that it could be a stuck injector or my TVR fuel pump maybe not givving enough psi (56 / 4bar) - it is working well enough - mega performance even running in in 2/3 / - 3/4 revs when warm. TVR pump to older Rover / Olds engine was regulated to 36 but likley producing more un regulated.
Any ideas - maybe getting UK guy to check the PCM later this week - but depends on what car PCM out of as to whether he can mod it - he can scan it in anycase and maybe give details to HRL.
Any useful comment welcome.
#1 thing that comes to my mind when i see a overly rich LS1 are o2 sensors...
if the O2s are bad, it doesnt always throw a code right away, but it will run 25% rich... rich enough for some smoke out the pipe and a rough idle.
if you have HPtuners, watch the O2 voltages in the chart... they should switch back and forth on a regular basis...
btw, when you say chipped, you mean the PCM has been tuned, right? not a actual piggyback modual between the PCM and harness, right?
if the O2s are bad, it doesnt always throw a code right away, but it will run 25% rich... rich enough for some smoke out the pipe and a rough idle.
if you have HPtuners, watch the O2 voltages in the chart... they should switch back and forth on a regular basis...
btw, when you say chipped, you mean the PCM has been tuned, right? not a actual piggyback modual between the PCM and harness, right?
Thread Starter
On The Tree
Joined: Nov 2004
Posts: 107
Likes: 0
From: UK
Originally Posted by MrDude_1
#1 thing that comes to my mind when i see a overly rich LS1 are o2 sensors...
if the O2s are bad, it doesnt always throw a code right away, but it will run 25% rich... rich enough for some smoke out the pipe and a rough idle.
if you have HPtuners, watch the O2 voltages in the chart... they should switch back and forth on a regular basis...
btw, when you say chipped, you mean the PCM has been tuned, right? not a actual piggyback modual between the PCM and harness, right?
if the O2s are bad, it doesnt always throw a code right away, but it will run 25% rich... rich enough for some smoke out the pipe and a rough idle.
if you have HPtuners, watch the O2 voltages in the chart... they should switch back and forth on a regular basis...
btw, when you say chipped, you mean the PCM has been tuned, right? not a actual piggyback modual between the PCM and harness, right?
Idle fine - low idle. 02 sensors new.
