Car trouble (1994 toyota supra)

357 · 03-07-2011, 12:25 PM

I had a similar problem once and it turned out to be the Mass Airflow (MAF) Sensor. Over time/miles it gets gummed up. When they fail they send bad data to the ECU, which in turn gives an improper fuel/air mixture ratio.

My car wouldn't idle at all, I had to keep my foot on the gas to keep it running. Not easy when trying to park or move short distances at slow speed.

HK3- · 03-07-2011, 12:31 PM

^^ The tapping sound is the giveaway. Pop the hood and scope the motor. Broom sticks, metal rods, etc.. make good scopes.

HK3- · 03-07-2011, 12:36 PM

If you're not familar with the scope-

"if you have a broom handle that you can use that is sawn off flat on one end. You can place it against the block in several areas and put your ear to it and hear the local noise of the engine more distinctly, especially knocks etc."

This will put you closer to knowing where the noise is coming from.

03-07-2011, 12:25 PM	#1
357 Will herf for food Join Date: Oct 2008 First Name: Mike Location: Home is where I park it Posts: 4,075 Trading: (9)	Re: Car trouble (1994 toyota supra) I had a similar problem once and it turned out to be the Mass Airflow (MAF) Sensor. Over time/miles it gets gummed up. When they fail they send bad data to the ECU, which in turn gives an improper fuel/air mixture ratio. My car wouldn't idle at all, I had to keep my foot on the gas to keep it running. Not easy when trying to park or move short distances at slow speed. __________________ “Eating and sleeping are the only activities that should be allowed to interrupt a man's enjoyment of his cigar;” Mark Twain

03-07-2011, 12:31 PM	#2
HK3- Cashmere Jungle Lord Join Date: Oct 2008 First Name: Boffa Location: The town so nice they named it twice Posts: 5,035 Trading: (48)	Re: Car trouble (1994 toyota supra) ^^ The tapping sound is the giveaway. Pop the hood and scope the motor. Broom sticks, metal rods, etc.. make good scopes.

03-07-2011, 12:36 PM	#3
HK3- Cashmere Jungle Lord Join Date: Oct 2008 First Name: Boffa Location: The town so nice they named it twice Posts: 5,035 Trading: (48)	Re: Car trouble (1994 toyota supra) If you're not familar with the scope- "if you have a broom handle that you can use that is sawn off flat on one end. You can place it against the block in several areas and put your ear to it and hear the local noise of the engine more distinctly, especially knocks etc." This will put you closer to knowing where the noise is coming from.