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Originally Posted by b1adesofcha0s
Well I have already upgraded my exhaust (CBE, intakes, and HFCs installed) so I will need a tune to fix it.
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Yeah your right a tune may fix it, also Skull Crusher provided some info on being too lean. The setup he mentioned is similar to your current mods, for myself I just have the ART pipes so I'm thinking I'm running rich.
Quote:
Originally Posted by Skull Crusher
Carbon deposits. You can't tell from your exhaust tips if it's to lean. Carbon is the black residue left over from the burnt fuel. With 10-15% ethanol used in most fuel today, it leaves a black carbon residue which is collected at the exhaust tip or exit. Every automobile today will have this residue.
You need to run a spark plug chop test and actually look at the base of the spark plug insulator with a magnifying glass. If it's really dark brown or black you're running rich. If it's really light tan, light gray or chalky white you're lean. What you're looking for is; a medium to dark tan. You can install a A/F Gauge but it's readings are more relative to the climatic conditions.
If your running an intake, headers, test pipes or HFC's, cat back and improved intake manifold you might be a tad lean, possibly. If not, there's no way the ECU will allow a lean condition.
Another way to tell is to pick a specific gear 2nd-4th, hold a specific RPM at around 3700-4000 and see if the Z surges slightly. You'll know exactly what I mean if you feel it. If it does, then it could be an indicator of running lean. You will also develop a lean "POP" under deceleration in every gear but will be progressively louder under higher rpm load in lower gears.
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Thanks for shedding some light on being too lean, probably won't go for the gauge but I'm going to conduct the specific gear test you mentioned. I believe I'm running rich and the manual says we don't need to change spark plugs until 184000 miles or so, I'm on 20,000 miles only so I won't be touching the spark plug yet.
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Originally Posted by Felix 808
Anytime, but another note on that is if you see white smoke or heavy steam, that is a bad thing. H2o no problem  |
Serious, wait is it normally to see smoke on a cold start. It does go away after you warm it up and drive a bit. If I do see heavy steam or white smoke what does that mean?