Miss firing?? Not sure!!!

SVXgarcia · #1 11-07-2009, 09:09 PM

Year:1992 SVX
Mileage: 135000

When car goes from zero mph I feel the car lacking power, even when I accelerate fast.
What exactly do I mean by lacking power, i will try to explain:
At take off the car feels almost as if the throttle cable was getting stuck and suddenly releases, causing the car to accelerate quickly. I can depress the pedal and the car will not go anywhere. Then suddenly the car accelerates.
When this happens I hear something clicking on the engine at the same time that the car quickly accelerates. Almost as if something was unclogging and finally the car accelerates again.
Problem happens only when the car comes to a full stop and I have to start from 0 mph. Doesn't happen on the highway.

Thank you for any help.

SoCal LS-L · #2 11-07-2009, 09:52 PM

Look above in the How-To documents on how to test your throttle position sensor.... that would be my first step in solving your issue.

immortal_suby · #3 11-08-2009, 05:51 AM

Also check for "check engine" codes. There is a how-to document to retrieve stored codes.

SVXgarcia · #4 11-08-2009, 08:37 PM

Thank you I will try both and report back.

SVXgarcia · #5 11-09-2009, 01:28 PM

Checked the engine codes and only got code 37 for No.2 Left Oxygen Sensor. Highly doubt the sensor will cause the problem mentioned above.

SVXgarcia · #6 11-09-2009, 01:49 PM

Should I replaced the TPS?

oab_au · #7 11-10-2009, 02:55 PM

Quote:

Originally Posted by SVXgarcia

Year:1992 SVX
Mileage: 135000

When car goes from zero mph I feel the car lacking power, even when I accelerate fast.
What exactly do I mean by lacking power, i will try to explain:
At take off the car feels almost as if the throttle cable was getting stuck and suddenly releases, causing the car to accelerate quickly. I can depress the pedal and the car will not go anywhere. Then suddenly the car accelerates.
When this happens I hear something clicking on the engine at the same time that the car quickly accelerates. Almost as if something was unclogging and finally the car accelerates again.
Problem happens only when the car comes to a full stop and I have to start from 0 mph. Doesn't happen on the highway.

Thank you for any help.

A couple of questions.

Does it do the same thing if you press the accelerator gently?
Does it do the same, if the engine is cold in the morning, or when it is warmed up?

Harvey.

SVXgarcia · #8 11-11-2009, 10:24 AM

Quote:

Originally Posted by oab_au

A couple of questions.

Does it do the same thing if you press the accelerator gently?
Does it do the same, if the engine is cold in the morning, or when it is warmed up?

Harvey.

Yes, it happens when press gently or fast

It does it both when warm and cold.

I will report back as soon as I get a day off to do some troubleshooting.
Thanks for all the valuable information.