and from what im seeing, it doesn't sound like your cat. anything over 45 mph you should hit OD gear and be running at much less rmps...less exhaust. If it chokes out when shifting at high rpm it could be a cat issue.

 

How would I check the fuel pressure?

 

get a pressure guage screw it into the port on the fuel rail

 

Oh, ok, he'll have to check that at school tomorrow...Thought it might be something I could do here at home...

 

Just took it for a spin around the block, got up to 35 and it started sputtering then died. when trying to crank it, it sounded horrible..clanks, and clunks, hard to crank..after 3 or 4 tries it cranked...drove back to the driveway and parked it...

I'm no mechanic, but it feels like it could be a fuel problem...

Suppose instead of guessing, I could just wait to see what code it is throwing...LOL

Thanks for the help...

 

your throwing a CEL?

 

check engine light came on...

 

ya see what the code is right now we are all just kind of guessing

 

The theory for troubleshooting a problem where a check engine light is present is ALWAYS the same.

Pull the stored codes.

Use the technology provided to you by your Jeep. OBD isn't perfect, but it will you lead you in the right direction almost always.

Post the EXACT codes here for comment.

 

autozone will read codes for free

 

do you know how to check codes by yourself?

 

The OP has a 1999. The key-on, key-off technique that works on older models will NOT work on a 99. All you will get is a "self-test" of the cluster, which many mistake for looking for codes.

For a 99, you will need either a scantool or a code reader.

 

I had a feeling.. thats why it was my second post lol

 

I know Autozone will do it for free, but I don't wanna drive that far to get it...The son can take it to school tomorrow, way closer, and read the code in class.. I'll post what he text me...

 

Its probably the cats my dads were clogged on his truck and that what it was doing.