Check Engine Light Problem

90silverstang · Jan 18, 2004

My check engine light comes on only when I accelerate. It goes off when I let up on the gas or just cruising. As soon as I step on the gas it goes on. Anyone have this same problem??

The Shape · Jan 18, 2004

You really need to pull the codes to find out what is going on. Autozone will do it for you for free or you can pick up a scanner at Wal-Mart for about $20.00 they are very handy to have around.

PRO50SC · Jan 18, 2004

I had this problem on my car several years back. It was the egr position sensor on top of the egr valve. (if your car is equipped with this) Over time the tip of the sensor wears from the constant contact with the egr valve. It wears just enough to knock it out of range and turn the light on and off as you described. Hope this helps out.

65ShelbyClone · Jan 18, 2004

All you need is an analog multimeter and a piece of wire to check codes. You can use the multimeter for more than code scanning later on.

90silverstang · Jan 18, 2004

Thanks guys I'll check the codes and the egr sensor.

bradranger · Jan 19, 2004

problem

yeah, pull the codes. I got a feeling it could be egr or tps sensor.

90silverstang · Jan 22, 2004

Pulled the codes

90silverstang said:
My check engine light comes on only when I accelerate. It goes off when I let up on the gas or just cruising. As soon as I step on the gas it goes on. Anyone have this same problem??

Well I pulled the codes here they are: 31 and 63. What do you guys think???

Idwitheld-1` · Jan 22, 2004

31 = EVP OR PFE circuit belowminimum voltage
63 = TP circuit below minimum voltage

EVP = EGR valve position...check connector, wiring, clean pintle tip.
TP = throttle position...check connector, wiring, possible dead spot in pot.

Hope this helps.

90silverstang · Jan 22, 2004

Idwitheld-1` said:
31 = EVP OR PFE circuit belowminimum voltage
63 = TP circuit below minimum voltage

EVP = EGR valve position...check connector, wiring, clean pintle tip.
TP = throttle position...check connector, wiring, possible dead spot in pot.

Hope this helps.

Thanks, I will check TPS tomorrow

MSM0075 · Jan 22, 2004

Just curious, What device/method did you use to run the codes? I used a OTC Scanner on my '93 beacuse I thought the TPS was bad and it pulled a lil different codes everytime I scaned.

90silverstang · Jan 23, 2004

MSM0075 said:
Just curious, What device/method did you use to run the codes? I used a OTC Scanner on my '93 beacuse I thought the TPS was bad and it pulled a lil different codes everytime I scaned.

I purchased a code reader from Walmart for $25.00. The brand name is Innova Model 3143. Hope this helps.

90silverstang · Jan 24, 2004

Idwitheld-1` said:
31 = EVP OR PFE circuit belowminimum voltage
63 = TP circuit below minimum voltage

EVP = EGR valve position...check connector, wiring, clean pintle tip.
TP = throttle position...check connector, wiring, possible dead spot in pot.

Hope this helps.

Thanks for info., Itwas a bad TPS. It had a dead spot in it, also replaced the egr sensor it was intermittent also. Thanks again.

Check Engine Light Problem

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