huntinbuck

I have a 93 grand limited 5.2 and I am having a couple problems with it that are confusing me.

1. I go start my zj in the morning to go to work it runs fantastic, I have a 20 minute drive to work she warms up before I get out of town. Then the problems start. I'll be driving and it'll cut out often(not misfire) then it stalls and I have to pull over wait a couple minutes and it starts right up no problem. This happens often but not every time I drive it. Wtf is going on with it. On to problem no. 2

2. If I drive for long periods of time(over an hour) the check engine light comes on and I get codes 51 & 52(to rich and to lean). I keep driving after the cel comes on and on light throttle it pulses. Also when I let off the throttle completely it jerks but only when the cel light is on.

On a side note after the cel comes on my gas mileage goes down the drain 8mpg freeway not very fun but when it is not on I see almost 18 freeway.

If you guys have any suggestions on what it is or where to begin that would be amazing.

I already did plugs and wires cap and rotor

fantacmet

Could you have perhaps a leaking gasket somewhere? Or leaking vac hoses?

huntinbuck

Nope the oil pan leaks a little and so do the valve covers

dave1123

As far as the valve cover leaks are concerned, when you have the covers off, clean out the head oil drains. You are capturing too much oil in the heads causing the leaks.

The stalling may be a crank sensor about to fail. The rich or lean condition can be caused by weak fuel pressure causing the 02 sensor to try to compensate. JMO. The pressure regulator is on the back side of the throttle body and is easy to change. It may be weak when it warms.

huntinbuck

Thanks for the advice in the valve covers. I did the normal fpr tests and it seemed normal I could try putting in a different one see if it is bad when it warms up

freegdr

Chrysler Australia, 1928-1981

Plymouth 1975-1983

Mickey Rooney’s Plymouth

Golden Commandos at the Hall of Fame





Allpar NewsDodge anniversary gear
2015 Chrysler 200: More uncamouflaged photos
Chrysler 200 revealed – no camo
Trostle to high school designers
Chrysler: one or two of Ward’s top engines
Cherokee: Europricey
More on the B-Jeep


Chrysler Fault Code 51 and 52: Engine running too rich or too lean

by Bob O’Neill and Bob Lincoln
For 1984 models, code 51 is triggered when the engine has been running lean or too rich for more than 2 minutes as reported to the computer by the oxygen sensor (O2). When code 51 is triggered, the power limited light will not be lit. If the condition which causes code 51 continues four times the time it took to set the code, the engine will run in closed loop mode, which forces it to run rich, preventing it from running lean. During closed loop the logic module continues to monitor the O2 sensor



Original is at Chrysler Fault Code 51 and 52: Engine running too rich or too lean http://www.allpar.com/fix/codes/faul...#ixzz2nU949IgQ
Follow us: @allparcom on Twitter | allparcom on Facebook

freegdr

Checking o2 and its wirings where id start.....but that's me.