92 Marquis check engine light problem

Problem: 92 Marquis 140K miles
1- Check engine light comming on and off.
2- Hard to start, takes 4 tries, then I have to let it warm
or it won't move. Hates the cold.
3- Even at highway speeds, check engin light will pop on and off.

Where do I go from here?

Get someone to run a scan tool on the car.

Problem: 92 Marquis 140K miles
1- Check engine light comming on and off.
2- Hard to start, takes 4 tries, then I have to let it warm
or it won't move. Hates the cold.
3- Even at highway speeds, check engin light will pop on and off.

Where do I go from here?

What kind of scan tool would I need? Is that something I can do myself?

A scan tool reads the computer codes, they are costly to buy, But from what I have heard on here and in other places, parts stores such as autozone will run a scan tool on your car for free.


What kind of scan tool would I need? Is that something I can do myself?

Autozone only scans 1996 and newer.

Alright. If you have a shop manual for the car or any other ford pre 1996 it will show you how to read the codes via check engine light, only thing needed is a short jumper wire and simply count the amount of flashs to get the code #, Or you can just buy a plug with a light on it that will flash the codes for you, They are cheap most parts stores have them, I even seen them at walmart.


Autozone only scans 1996 and newer.

man let me tell u i have the same prob and ur just starting a long joruney of check engine lights but i saw at walmart that they sell a special code reader for obd1 fords only so look into that its a nice tool to have and its only like 30$

3145 Digital Ford Code Reader (1981 - 1995) (http://www.iequus.com/item.asp?cid=3&pid=3145)

What was wrong with your Marquis?

Alright. If you have a shop manual for the car or any other ford pre 1996 it will show you how to read the codes via check engine light, only thing needed is a short jumper wire and simply count the amount of flashs to get the code #, Or you can just buy a plug with a light on it that will flash the codes for you, They are cheap most parts stores have them, I even seen them at walmart.

Any one know of a web page that explaines how to do this in detail?

Any one know of a web page that explaines how to do this in detail?
file:///C:/WINDOWS/Temporary%20Internet%20Files/Content.IE5/KHI7SLQB/256,1,C S (Car Science) 101 (http://)

Should start on the 4th or 5th page.

Any one know of a web page that explaines how to do this in detail?

Sorry, But this like does't work.

http://slappy.cs.uiuc.edu/fall00/team4/Docs/Jim-292presentation.ppt

Power point presentation. Try this link.

Sorry, But this like does't work.

Thanks for the link. One question: does the check engine light show a number, or does one have to count flashes? The link doesn't really go into this.

You have to count the flashes.
Let us know what you find.