If it has the EEC self-test plug as in the photo above it is OBD-1.
If it has a MAP sensor mounted on the safety (fire) wall by the heater box with a vacuum line and an electrical plug then it is OBD-1.

If it has MAF sensor mounted on the air intake it is OBD-2.

 

He is talking about the same place as I have in the photos above with the same type of valve on the fuel rail.
Except he has his left and right mixed up.
You need the fuel pressure gauge and it screws on and does not plug in.

 

Ok, thanks again Bill. I guess we will definitely have to get a fuel pressure gauge. I'm assuming that its a OBD I. Because the only way that it would have the MAF sensor is if it was a California truck, which I doubt, or if someone swapped it to MAF right? But I will have to take a look at it for myself.

 

That is correct.

 

If there is no fuel pressure gauge available, you can use a tire pressure gauge. I did so just today.

 

Ok, thanks. Are you sure it works just as well as the gauge?

 

Well, it works good enough for a field diagnosis. If the pressure looks bad with the tire gauge, I would then feel better buying an actual fuel pressure gauge.

 

A fuel pressure gauge isn't that expensive. Just buy one. It's not like it's a specialized part or something you'll only use once.

 

I was just throwing that out there because sometimes you CAN'T just go buy one. I wasn't able to buy one today, so I used a tire pressure gauge.

 

Ok, thanks guys. Since you brought it up Ben, I was just wondering if it did in fact work as well as the actual fuel pressure gauge. Because then we wouldn't have to worry about going out and buying one, but we will probably end up buying one anyways.

 

Once you buy the gauge, see if a tire pressure gauge gets the same reading and let us know, please.

 

Haha.. Yup no problem, will do.

 

Some times the tire pressure gauge does not work at all. I tried one on my 95 F150 5.0L and the tire gauge would not open the valve so it did not read at all. I just had to try it.

This is the one I tried that was recommended by my brother in law.


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Does anyone have a recommendation for a source/brand of fuel pressure gauge? This is something I'd like to add to my toolbox.

 

I bough this one from amazon.
Amazon has it for $29.75.
It is the one I take with me on the road.
O'reilly auto also sells it.
http://www.oreillyauto.com/site/c/de...keyword=cp7818


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