ebowman85

I got my engine replaced with a Jasper in my 01 cherokee. Ever since I've had it back the engine light has been coming on and throwing several codes. I've plugged a little scanner in and cleared the codes a few times and pretty much the same codes come back. The codes are:
P0204
P0205
P0206

P0304
P0305

P0171

I know the P020X codes are something with the injectors, the p0300 are misfires and the p0171 is bank 1 too lean.

There were no codes before the engine was replaced.

I took it back to the mechanic and he said he replaced two o2 sensors: upstream rear and downstream front. He said the other o2 sensors tested good.

The jeep sat for probably a good two months before the engine was replaced. So I'm sure the gas got pretty crappy. When I got the jeep back I put treatment in and have been ever since.

I took the injectors out and cleaned them... Whether or not it was a good thorough cleaning, idk but they seemed to spray good. It didn't seem to help a whole lot. I've also ran fuel injector cleaner in my gas.

The codes are still popping up and it still idles rough, black soot out of tailpipe, and worse MPGs than before then engine was replaced.

I feel that all these codes are related and there could be one thing causing them.
Thanks for any input

RTorrez1

The mechanic that did the work should have never released the truck to you until he fixed it right and find out what the problem is. Also you should have never driven off with it like that.

ebowman85

He thinks I just need to keep driving it to get that bad fuel out and what not. I've put about 1500 miles on it now and I'm tired of driving over 60 miles everyday and having to fill up every other day

OverlandZJ

Camshaft position sensor needs adjusting properly would be my guess.

To do this properly requires a $$ DRB scanner. Or the "toothpick method" at minimum while set at TDC.

I googled real quick but cant seem to find the procedure from the Factory service manual. Can someone C&P the appropriate section.

I had the same issues with my wife's WJ when I dropped in a new engine.

ebowman85

Thanks for the input. I'll look into that and do more research. If you find it let me know

prcherokee

INSTALLATION—OIL PUMP DRIVE AND SENSOR
(1) Clean oil pump drive mounting hole area of
engine block.
(2) Install new oil pump drive-to-engine block gasket.
(3) Temporarily install a toothpick or similar tool
through access hole at side of oil pump drive housing.
Align toothpick into mating hole on pulse ring (Fig.
30).
(4) Install oil pump drive into engine while aligning
into slot on oil pump. Rotate oil pump drive back
to its original position and install hold-down clamp
and bolt. Finger tighten bolt. Do not do a final tightening
of bolt at this time.
(5) If engine crankshaft or camshaft has been
rotated, such as during engine tear-down, CMP sensor
relationship must be reestablished.
(a) Remove ignition coil rail assembly. Refer to Ignition Coil Removal/Installation.

(b) Remove cylinder number 1 spark plug.
(c) Hold a finger over the open spark plug hole.
Rotate engine at vibration dampener bolt until
compression (pressure) is felt.
(d) Slowly continue to rotate engine. Do this
until timing index mark on vibration damper pulley
aligns with top dead center (TDC) mark (0
degree) on timing degree scale (Fig. 31). Always
rotate engine in direction of normal rotation. Do
not rotate engine backward to align timing marks.
(e) Install oil pump drive into engine while
aligning into slot on oil pump. If pump drive will
not drop down flush to engine block, the oil pump
slot is not aligned. Remove oil pump drive and
align slot in oil pump to shaft at bottom of drive.
Install into engine. Rotate oil pump drive back to
its original position and install hold-down clamp
and bolt. Finger tighten bolt. Do not do a final
tightening of bolt at this time.
(f) Remove toothpick from housing.
(6) Install sensor to oil pump drive. After installation,
the CMP sensor should face rear of engine 0°.
(7) Install 2 sensor mounting bolts and tighten to
2 N·m (15 in. lbs.) torque.
(8) Connect electrical connector to CMP sensor.
(9) If removed, install spark plug and ignition coil rail.

ebowman85

Wow... Sounds like I should find a shop with one of those scanners as long as they don't charge me an arm and a leg.

RTorrez1

Just don't go back to the same shop the did the work the first time since the don't have a clue on what they are doing. BTW, If you took it back to the same shop now I bet that the will tell you that you caused the problem because you have been driving it for so long with the light on and they will want to rip you off for a lot more money.