Jaime

The plugs were in good condition and all uniformed. I have not changed the O2 sensor since I got the truck about 4 or 5 years ago. Do you think that might be my problem and is there a way to check it before I change it? I will test the MAP sensor in the morning and get back to you. Thank You

The wiring to the CPS looks OK and it was changed about 9 months ago. Any other suggestions by anyone are greatly appreciated.

I checked the fuel lines and they seem OK no cracks or spongy feel to them. I did not see any cracks in the coil. The fuel sock was brown and a little clogged up but the inside of the tank looked really clean. I have a manual transmission I don't see how it could affect the engine but thanks for the suggestion. Thanks Jaime

Hello everyone. I've been a member of the club for a while now but have never posted anything. Usually I just do a search and get the answer I need, but not this time. I have an 88 basic long bed truck with a 4.0 engine 5 speed manual transmission and a D35 differential. Pretty much stock I belive. My problem is that the engine hesitates bucks and jerks after it sits for a while. In the morning I drive it for about 7 miles on the street no problem stop and let it sit for about an hour. Then I drive it for about 1/2 a mile thats when it starts to jerk. Using the search feature here I tested the following and replaced them. Fuel pump passed the pressure test but failed the pinch return line test so I replaced the pump and filter. Fuel pressure regulator swapped with a used one but both past the test. Manifold gasket replaced. When I did this I had to replace the O rings in the fuel injectors. Some started to leak so I replaced them all. TPS replaced and adjusted to .8 volts going out and power going in is at 4.9 New plugs, cap, rotor and wires. Any help will be greatly appreciated Thank You Jaime