Hesitation & bogging down - UPDATE - Problem solved

[robfg67]

Symptoms:

Engine starts fine and runs at normal idle. As I start to depress gas pedal, the engine hesitates & bogs. I cannot get above 8 MPH.

 

History:

Other than being old (140K miles), this engine has been extremely well taken care of and this is the first mechanical problem since I've owned her (almost 3 years).

My coolant bottle cracked recently and I replaced it with a new one. Also replaced the heater hoses and upper radiator hose at the same time (had no issues with the hoses, but they looked tired). Purged the system correctly and it does not leak anywhere or overheat.

However, I did drive the Jeep home (about 5 miles-all back roads-no highway) with the cracked bottle-the temp gauge read over 260 while steaming badly at the bottle & around the manifold side of the valve cover.

 

Cause???:

Because the overheating problem appears to be corrected, I'm not sure if I have an unrelated engine control issue (EGR, TPS or similar) or could the block/manifold be damaged from the 5-mile overheating ride home.

 

Can you guys recommend any possible causes and/or tests I can run to identify the problem? Thanks!

 

It just fixed itself! After my third test-drive she started running normal. I have no idea why.

[dasbrick]

try the fuel pump or fuel filter. thats where mine was a few months ago.