Well here it is. Everyday on the way to work my CHECK ENGINE light comes on while I am coasting downhill on the freeway. Then when I give the car gas the light will turn off. Then once I start coasting again it will turn back on. Its on the same part of the highway everyday. It used to only do this when I would really get on my car and then let off the gas. Well now it does it alot. What can I do or try? Should I take it to the shop and have them run codes?
Help me out here
- Thread starter 92greenlx
- Start date
stangbear427
Active Member
stang976
New Member
As requested...
Dump the codes and see what the computer says is wrong…
Here's the link to dump the computer codes with only a jumper wire or paper clip and the check engine light, or test light or voltmeter. I’ve used it for years, and it works great.
See http://www.troublecodes.net/Ford/
OR
See http://www.dalidesign.com/hbook/eectest.html for more descriptive help
OR
See http://www.mustangworks.com/articles/electronics/eec-iv_codes.html
IF your car is an 88 stang, you'll have to use the test lamp or voltmeter method. There is no functional check engine light on the 88's except possibly the Cali Mass Air cars.
Dump the codes and see what the computer says is wrong…
Here's the link to dump the computer codes with only a jumper wire or paper clip and the check engine light, or test light or voltmeter. I’ve used it for years, and it works great.
See http://www.troublecodes.net/Ford/
OR
See http://www.dalidesign.com/hbook/eectest.html for more descriptive help
OR
See http://www.mustangworks.com/articles/electronics/eec-iv_codes.html
IF your car is an 88 stang, you'll have to use the test lamp or voltmeter method. There is no functional check engine light on the 88's except possibly the Cali Mass Air cars.
If the possibility of miss-connecting something makes you nervous, spend $25 or so at Wal-Mart or the auto parts store and get a code scanner. They are Murphy-proof as far as connecting them up. That way you can dump the codes and save $$$ from not going to the shop. Use it once & fix something and it has paid for itself.
92greenlx said:
Plug it in and watch the single flashing LED. The $25 model does not come with a nice LCD display that spells out the codes numerically. Follow the instructions on how to count the flashes and you are good to go.
rsw007
New Member
mine has done that in past had to clean egr valve with some carb cleaner ford likes there cars to run rich "safe mix"
rsw007
New Member
Two bolts hold it on the side of your egr spacer. take it off and clean it. you will see the valve part that gets stuck. spray down in the two holes and let sit for few minutes then pour it out and wipe it out then reinstall.
rsw007
New Member
rsw007
New Member
I went to autozone and they said they cant pull codes on my car. Only 97 and newer. I found 2 vaccum leaks. I also set my idle as best as I could and advanced my timing to 12 deg. I now Just need to clean out my IAC and my EGR valve. But my car is acting better now and drives better as well. So hopefully once I clean out my IAC and EGR my cold start problem will go away.
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