OK so tps is good while i was checking it i saw that the throttle linkege was broken the cable that has the plastic screw cap fixed that and now NO HESITATION!! I guess that was the problem

 

We at least pointed you in the right direction. Glad you got it resolved!

 

so now its running rough sounds like a miss replaced the cap and rotor, tps and adjusted that to spec. I read that the EGR valve could cause rough idle, so I checked the valve and noticed that the valve is smashed do you think this could be the issue?

 

Yep.

 

Yep. X2. Replace it. Proper EGR is important.

 

I have a similar issue but my jeep does it at idle, at rpms from 600-2500, it is interminent as well. But my main focus is it is a rough idle, hesitates on any surface and while driving will loose power ( studders ) and then gains it like its missing or as I think dropping a cylinder ( spark or fuel ) I havent got to dig too much into it because I been busy with work and personal stuff. It has new spark plugs, wires and cap n rotor replaced by p/o and it appears to have a new TPS. I do need to check the TPS. But im wondering if the EGR valve may be my problem??

 

Check the contacts in your plug wires first (free and easy).

 

If you're wondering about the EGR, test it:



TESTING THE EGR VALVE FOR 87-90 4.0 ENGINE
Valve Opening Test
1) With engine at normal operating temperature and at idle,
rapidly open and close throttle. Open throttle sufficiently to obtain
at least 1500 RPM. Movement should be noticed in EGR diaphragm.
2) If diaphragm does not move, probable causes are: faulty
vacuum signal to EGR, defective EGR diaphragm or defective
backpressure sensor diaphragm (if equipped), or leaks in vacuum lines
or connections.
Valve Closing Test
1) With engine at normal operating temperature and at idle,
manually depress EGR valve diaphragm. RPM should immediately drop,
indicating that EGR valve is not leaking and had been properly cutting
off exhaust gas flow at idle.
2) If there is no change in RPM and engine is idling
properly, exhaust gases are not reaching combustion chamber. Check for
plugged passage between EGR valve and intake manifold.
3) If engine idles poorly and RPM is not greatly affected by
manually moving diaphragm up, EGR valve is not closing off exhaust gas
flow. Check for carbon between pintle, leaking EGR valve gasket or bad
EGR valve.
***************

 

I will check my wires thursday, I just did a 4x4 service on it at work today so Im just trying to catch up on all the little things before I goto browns.