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Doug, ASE Certified Technician
Category: Mitsubishi
Satisfied Customers: 8609
Experience:  Mitsubishi employed and Factory trained ASE certified technician
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2004 mitsubishi galant gts. the TLC light is on and remains

Customer Question

2004 mitsubishi galant gts. the TLC light is on and remains on. the car wants to die at idle. we have changed plugs. the plug seals were leaking we had oil on the plugs. thought that might be the prob but after taking top end apart and changing plugs seals and replacing all caskets we still have the problem.
Submitted: 1 year ago.
Category: Mitsubishi
Expert:  Doug replied 1 year ago.
Hi,With regard to the wanting to die at idle, when was the last time the throttle body was fully cleaned?
Customer: replied 1 year ago.
not sure bought the car used. will do that now...
Customer: replied 1 year ago.
i was thinking the Maf was bad but that would not cause the TLC light to remain on right
Expert:  Doug replied 1 year ago.
Thanks.Lets get that intake hose off and then take a look inside the throttle and see how gunked up it is. These are painfully overlooked as far as maintenance goes.Either with a helper holding the pedal down with the key on or holding the plate open by hand with the key OFF (do nottry to manually move the throttle if the key is on), use a rag soaked in solvent to reach in and wipe it out... don't spray anything into it, just use a saturated rag to clean. If you have hard deposits, use a scotch brite pad, wire brush, etc. Yes the MAF is a possibility, but the throttle being dirty is something that always occurs whereas MAF failures are fairly rare (They do fail, just not a lot). Either one could cause the TCL light, as it comes on anytime a problem is found in either the ABS or engine controls.
Expert:  Doug replied 1 year ago.
If you need more help just let me know.