1994 Toyota Corona excessive fuel consumption


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1994 Toyota Corona excessive fuel consumption

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Auto Repair Home>> Automotive Repair>> Engine Troubleshooting

dustincarlo
New User

Apr 2, 2014, 12:23 AM

Post #1 of 3 (1343 views)

1994 Toyota Corona excessive fuel consumption	Sign In

Hi! I use a 1994 Toyota Corona as my daily commute. So far it has logged 275K kms without much issues. Recently I had the engine overhauled and replaced the following; Timing belt, tensioner bearings, con rod bearings, piston rings, In/Ex valves, valve seals, water pump, and spark plugs. However when it was completed, I noticed that black smoke is being emitted from the exhaust pipe and the fuel consumption was so terrible. I had the spark plugs inspected and they were covered with soot indicating the presence of unburned fuel.

I already had the coil replaced and still emits black smoke. Also I tried inspecting the fuel rail regulator but it seems to be in order. What did the mechanic miss here? Please help?

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Apr 2, 2014, 5:27 AM

Post #2 of 3 (1319 views)

Re: 1994 Toyota Corona excessive fuel consumption	Sign In

If just done why aren't you back where it was done?
Check oil now for fuel odor or if level too full. At first glance this suggests the engine coolant temp isn't being sensed or sent for proper fuel delivery always thinking it's cold.

That over fueling will quickly kill converter. What happened to make you do all that to the engine to begin with as it may still have what caused a quick wear out like diluted oil,

T

dustincarlo
New User

Apr 3, 2014, 8:32 PM

Post #3 of 3 (1288 views)

Re: 1994 Toyota Corona excessive fuel consumption	Sign In

Thank you Tom. Yeah I brought the car back to my mechanic to have it checked. After undergoing the routine "tune-up" procedures, the problem wasn't solved. Its is kinda puzzling because the "check engine" light don't even appear. By the way the car has a 3S-FE, 2-liter engine. Before, the car runs at 10kms/liter, currently 3 kms/liter!!!.

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