Oldsknhed

I have a 95 Grand Cherokee Laredo with an intermittent bogging out issue, almost like it's out of gas. Wierd thing is , I let it sit for 5 or 10 minutes and then no problems. I had replaced the fuel pump and filter about a year ago, seemed to fix the issue. At that time the problem was not that prevalent... I'd drive on the turnpike for 40 miles, when I slowed at a toll it would have the bogging issue when I tried to speed up coming out of the toll. Once again, a 5 or 10 minute rest and I could drive the rest of my trip( about 50 more miles). Now it does it after 10 or 20 miles and after giving it a rest, it does it again 10 or 20 miles after that.

I'm thinking if it were the filter it would have this issue constantly. I've run some premium gas and Lucas thru, no change. No check engine light when it happens. Could this be electrical ? Computer ?

Any help would be greatly appreciated.

Bustedback

You could have a bunch of crap in the tank and it's clogging the fuel sock on the pump. Or it could be the cat converter clogging when it gets hot. Get a vacuum gauge and a fuel pressure gauge, the drive your normal route while watching the two gauges. If you start to lose vacuum and actually have pressure on the vacuum gauge when it starts to bog, you have a clogged exhaust. And if you start losing fuel pressure when it bogs, you have a bad pump or a clogged sock/strainer.

Oldsknhed

Busted, thanks. I will check the fuel pressure today. Yesterday the issue got so bad I had to stop about 5 times during a 10 mile drive. When it started bogging I put the car in neutral then shut the engine off as I was rolling. When I restarted, it seemed to go right away, temporarily.

Some additional info, I noticed some oil blow back in the air filter ( rings? ), could this screw the exhaust up ? Also, the cat was removed when I replaced the muffle last year. Sounding more and more like the fuel pump I got crapped the bed. I remember the guys who did it just replaced the pump itself, not the whole housing.

Oldsknhed

Could the fuel pump housing be an issue, since it happens more when the tank is 1/4 full or less ?

Bustedback

Replace the whole module, not just the pump inside.