... OK I wake up in a new world every day. So new problems last night .. I jump in it to go check the pasture looking for some one hunting that not supposed to be on me. In the dark my neighbor & I are just out making a show to run off who ever is sneaking in. We're running some big lights. & traveling all over the place. There were lots of Skunks out so we did get into shooting 7 skunks ....
... But we'd pull into a different pasture with no lights an set ''idling''looking for lights walking along. As it was setting there idling for about 5 minutes .. It will just go into a stumbling fit until it dies or you turn it off.. I could restart it in one second and it'd run fine .. It did it 4 times last night and has never done it before .
.. I went skunk HUNTING AGAIN TONIGHT .. I just got in at 1.45 ....... No codes and it did not do this again tonight .
I've not swapped any of the relays..............
... I'm wanting to buy a fuel pressure checker , off E Bay .....
Times they are tough !!!! So Outside purchases are an added feature.
OK MY CEL has not came on lately but I'd sure like for it to come on.. I had sat & Idled saying good bye to a neighbor who had been hunting with me. So it idled for about 10 minutes .. A s I pulled away it would not run.. no throttle response.. missing and idle had dropped to about 300 then it dies after about 1 minute of it's B/S .. I turned off the key and it restarts with no issue.... Why if it's going through such convulsions did it not set a CEL. This is about the 12th time it has done this.
.......If it's a bad computer does it not set that code..
The CEL only comes on when the problem affects emissions. It will tell a lie though.
The PCM does not monitor the following circuits,
systems and conditions that could have malfunctions
causing driveability problems. The PCM might not
store diagnostic trouble codes for these conditions.
However, problems with these systems may cause the
PCM to store diagnostic trouble codes for other systems
or components. For example, a fuel pressure
problem will not register a fault directly, but could
cause a rich/lean condition or misfire. This could
cause the PCM to store an oxygen sensor or misfire
diagnostic trouble code
The fuel pressure regulator controls fuel system
pressure. The PCM cannot detect a clogged fuel
pump inlet filter, clogged in-line fuel filter, or a
pinched fuel supply or return line. However, these
could result in a rich or lean condition causing the
PCM to store an oxygen sensor or fuel system diagnostic
SECONDARY IGNITION CIRCUIT
The PCM cannot detect an inoperative ignition coil,
fouled or worn spark plugs, ignition cross firing, or
open spark plug cables.
The PCM cannot detect uneven, low, or high engine
The PCM cannot detect a plugged, restricted or
leaking exhaust system, although it may set a fuel
FUEL INJECTOR MECHANICAL
The PCM cannot determine if a fuel injector is
clogged, the needle is sticking or if the wrong injector
is installed. However, these could result in a rich or
lean condition causing the PCM to store a diagnostic
trouble code for either misfire, an oxygen sensor, or
the fuel system.
EXCESSIVE OIL CONSUMPTION
Although the PCM monitors engine exhaust oxygen
content when the system is in closed loop, it cannot
determine excessive oil consumption.
THROTTLE BODY AIR FLOW
The PCM cannot detect a clogged or restricted air
cleaner inlet or filter element.
The PCM cannot detect leaks or restrictions in the
vacuum circuits of vacuum assisted engine control
system devices. However, these could cause the PCM
to store a MAP sensor diagnostic trouble code and
cause a high idle condition.
PCM SYSTEM GROUND
The PCM cannot determine a poor system ground.
However, one or more diagnostic trouble codes may
be generated as a result of this condition. The module
should be mounted to the body at all times, also
PCM CONNECTOR ENGAGEMENT
The PCM may not be able to determine spread or
damaged connector pins. However, it might store
diagnostic trouble codes as a result of spread connector
i have jeep grand cherokee 1997 5.2 v8 , and it was not coming on because of engine computer wents wrong.(eng computer no# 418AB) so we had fixed a second hand computer ( 523AD ) . now it start but check engine light came on and some missing is there in engine.
Now kindly help me out from this , first of all want to know whether we can use the above mentioned computer in replace of 418AB or not.
Secondly want to know why the missing appears?
We had change the plugs and distributor wires also but still missing is there.
Don bhai as I recall while working at the stealership you could only expect the Vin specific PCM to fit your ride.And as a lot on here have said the Florida based rebuilts don't get a good grade.
.. I don't believe that chrysler is the only place to get a good PCM. BS .
Zee Jay back to mine .. This is odd my Jeep is actually running better every day.. Remember I had loaned it out to a Broke friend .. He drove it for a complete year before he could return it.. So it would just barely run for him .. I told him to put a new battery on it and tune it up. Funny he just couldn't s[end money on a borrowed car. So I waited and it got to where it would just not start with out a Boost from a big old diesel service rig he was driving. He was boosting his wife off so she could get to work .. SO FINALLY IT JUST WOULDN'T GO & they returned it...
... So I got a new battery for it .. Put in a set of champion spark plugs . NEW wires cap & rotor .. Several bottles of injection cleaner & several tank of 93 opt gas .. & I'm driving it daily .. AND I sure looked for a vacuum leaks 50times but I haven't found one yet.
.... But amazing I've been on 3 long trips 150 miles . set the cruise at 70 and get almost 20mpg. with this allwheel drive . I think this is good ..
.... But it is still missing at idle but runs good every where else. Most days I can floor it now an run hard up to the shift .. Some times it dies back up at top rpm just before shift .. Like a bad fuel pump.. I need to get my gauges on it an drive with them under the wipers for a while .. But it's been way to rainy lately ....