93 Mighty Max Low Power

[reallango]

I have a 93 Mighty Max 2.4l that had 300,000 miles on it. I just rebuilt due too a cracked head and thrown rod. So replaced the Head and Crankshaft. I sent the engine in to be cleaned a preped. I also replaced the pistons, O2 sensor, coolant temp sensor, plugs, oil pump, fuel pump and filter. So after god knows how many headaches the truck is running again. Although now its smoking and getting low power. I'm sure its running too rich as I'm getting unburned carbon out the pipe. The check engine light is on so I pulled the codes. I'm getting a 21 (Coolant temp sensor) but only after a bit of driving. And a 42 (Fuel pump system) and that one come up as soon as you start it after clearing the codes. I'm pretty sure the Timming belt is on correctly but not so sure the Dis timing is set right. My dad adjusted it for me but forgot to ground the ECU pin. Not sure if that could make it run so rich. Any help or ideas would be greatly appreciated as my dad is a retired mechanic but I'm just a lowly PC tech so very little experience with such issues. Also if someone could point me in the right direction for this manual section I keep hearing about.

[Rahtid]

A bad coolant temp sensor, can cause the truck to run rich

[Rickdees]

Advanced timing can make it run rich, emissions of high CO and run hot, also float level, high fuel prsesure can too.

[camoit]

All of the above and this.
http://www.mightyram50.net/vbulletin/showthread.php/2258-G63B-2-0L-Cam-Timing-Mark

[reallango]

Well I adjusted the timing last night and it seems to be running much better. It wasn't even close. When I installed the timing belt I did match up with the correct mark on the head. I drove it home on the interstate last night and checked the codes again. I'm still getting the code 42 which is driving me nuts since I changed the fuel pump, strainer and filter. Any ideas of what else could be causing the code 42.

[reallango]

Ok so I played with it some more last night and the timing is now dead on. I seem to have much better power and I'm not getting smoke anymore. Although I'm still having the code 42 for the fuel system. I also notice that it seems sluggish to respond sometimes like it's having trouble getting gas quickly enough. As I stated before I have already changed the Fuel pump strainer and filter. So I'm guessing I might have a clogged fuel line or an issue with the fuel pressure regulator. Is there any good way to troubleshoot this issue further? I'd hate to spend 80$ or so on a fuel pressure regulator that I don't need.

[DroppedMitsu]

I would say fuel press. Reg or maybe gas cap? Or evap return line, check the manual for troubleshooting the code

[camoit]

You would need to put a pressure gage on the fuel rail and check pressure wile driving. Thats the only way to check the regulator.

[Rahtid]

there isn't a test port on the fuel rail on these trucks, I used an adapter that fits in between the fuel hose and the fuel line by the fire wall

[reallango]

can you let me know what adapter you used. I rented a fuel pressure tester but can't hook it in. I tried finding a adapter that would work but haven't had any luck yet.

[Rahtid]

The adapter i used came with the fuel injection machine i used. where did you rent the fuel pressure tester from

[reallango]

It came from autozone. But we didn't see anyway to connect it to the fuel rail.

[Rahtid]

Did you get this sorted out

[reallango]

Did you get this sorted out

Actually no I haven't touched it since. I've had another issue crop up. I can no longer shift into gear. It seems where the linkage goes to the transmission something is messed up. Everything up to the transmission looks fine but unfortunately I can't get to where it actually connects since it's on the topside of the transmission. If anyone knows what part that may be and if I'm going to have to drop the transmission to replace it. It seems like the metal the linkage connects to is bending instead of moving like it should.

I still would love to know if someone can give me a part # for a fuel pressure tester that will work for this truck so once I get the transmission shifting properly I can try and hunt down that issue.

Thanks to everyone for the help and advice up to this point.

[Rahtid]

sounds like the shifter bushing http://www.ebay.com/itm/Dodge-D50-montero-pajero-km145-km132-Conquest-shifter-bushing-NOS-colt-arrow-/321201574173?_trksid=p2054897.l4275

[DroppedMitsu]

The shifter probably came out of the slot, because of the bushing. Pull the shift boot off, and there are three bolts To pull the shift ass. Off and take a look

[reallango]

sounds like the shifter bushing http://www.ebay.com/itm/Dodge-D50-montero-pajero-km145-km132-Conquest-shifter-bushing-NOS-colt-arrow-/321201574173?_trksid=p2054897.l4275

This appears to be a part for a manula transmission. Mine's an automatic. And I traced from the shifter to the transmission. Those linkages are moving correctly but where it reaches the transmission there seems to be an issue although I can't see it since it seems I would have to drop the transmission to get to it. I thought about cutting an access in the floor but didn't know if I would still have to drop the transmisson

[DroppedMitsu]

Sorry thought you had a manual tranny. Make sure your kickdown cable coming off the carb is adjusted correctly or it won't shift right. There's manuals somewhere on the board

[BradMph]

The fuel pressure need to be checked before or after the fuel regulator? or does it matter. I would think after the regulator.
Anyway...here is your entire fuel system.

Click images to enlarge
6780
6781

[reallango]

Sorry thought you had a manual tranny. Make sure your kickdown cable coming off the carb is adjusted correctly or it won't shift right. There's manuals somewhere on the board

All good. I already adjusted the downshift cable awhile back everything was going decent until this. what really sucks is I had it parked on rocks when it decided it didn't want to shift out of park. Wish I would have left it in the driveway as now I can't even push it anywhere.

[camoit]

Do you feel it clicking through the gears? It could be a loose shifter linkage bolt at the trans.

[reallango]

Do you feel it clicking through the gears? It could be a loose shifter linkage bolt at the trans.

Yea it's not shifting through anything. but when we disconnected the linkage right before the trans and tried moving it by hand it just felt like a piece of metal was bending instead of moving. I wish the linkage was on the side instead of the top where you can't really get to it.

[camoit]

If you jack up one wheel and release the brakes to remove any bind from the drive train, does the same thing happen?

[reallango]

If you jack up one wheel and release the brakes to remove any bind from the drive train, does the same thing happen?
You know I'm not sure. I'm assuming you mean one of the rear wheels. I have the front jacked up which was apain in the A$$ since its on rocks currently. I'm going to a concert tonight so if I don't try this today I'll have to try it tomorrow.

[reallango]

Well I finally got to looking at it a bit more and where the linkage connects to the transmission is definitly just bending. So I'm thinking it's like I've read where maybe the truck moved a little after putting it in park so the transmision can't shift due to pressure. But in this case the metal must have been week and therefore just bends now. Problem is I can't seem to find out the part I need to order. Is there a good transmission diagram out there that may help me hunt down the part?

[camoit]

Can you post up a picture of what you bent.
As for the picture look in the manual section> over 216 manuals> montero and MM truck.

[reallango]

Can you post up a picture of what you bent.
As for the picture look in the manual section> over 216 manuals> montero and MM truck.

I've looked in a few manuals and service documents but haven't seen anything on the tranny. I wish they actually had a service manual for this truck instead of this aftermarket garbage.

Here's a picture of the linkage connecting to the tranny. The arrow in the second picture is pointing at the part thats bending. Due to the location this is the best picture I can get without dropping the tranny.

69536954

[reallango]

Ok So I still Haven't go this worked out. I did get the Part removed and took a few pictures of it off the transmission. I have no idea what this part is called or where I would get a replacement. If anybody has any ideas where I might get this part from it would be very helpful.

7661
7662
7663

[royster]

That parts looks like it bent due to a pivot bearing that should be there. Look up your truck on http://www.rockauto.com/ and go to "transmissions, automatic" and I'll bet that's the part that fell off.

As for the linkage, I'd wager you could find one in a junk yard or even make one yourself. I'll let the experts on this forum say whether or not it could be tack-welded.

My 2 cents :)

[reallango]

That parts looks like it bent due to a pivot bearing that should be there. Look up your truck on http://www.rockauto.com/ and go to "transmissions, automatic" and I'll bet that's the part that fell off.

As for the linkage, I'd wager you could find one in a junk yard or even make one yourself. I'll let the experts on this forum say whether or not it could be tack-welded.

My 2 cents :)

Well I don't see anything on there that's obviously missing. But it is a bit hard to tell without a schematic of the linkage. All I've found is transmission internals.

Although we're thinking it broke due to me not putting the jack or a stand under the transmission when I removed the engine.

I'm going to try going by the dealership during lunch today and see if they can help. I don't like the idea of welding it since it was such a pain to get out. I also can't really see myself removing it at a junkyard as it took me about 2 hours to get it off without dropping the transmission.

I'll post back if the dealer is any help. Thanks for the thoughts.

[reallango]

Well I don't see anything on there that's obviously missing. But it is a bit hard to tell without a schematic of the linkage. All I've found is transmission internals.

Although we're thinking it broke due to me not putting the jack or a stand under the transmission when I removed the engine.

I'm going to try going by the dealership during lunch today and see if they can help. I don't like the idea of welding it since it was such a pain to get out. I also can't really see myself removing it at a junkyard as it took me about 2 hours to get it off without dropping the transmission.

I'll post back if the dealer is any help. Thanks for the thoughts.

Well looks like I was able to order it from the dealer. It took some looking to find the right part but I'm hopeful that when it shows up next week it'll be the right thing.

[royster]

I also can't really see myself removing it at a junkyard as it took me about 2 hours to get it off without dropping the transmission.


Those of us out here on the east coast are sort of screwed in winter as far as going to junk yards is concerned: who the heck wants to spend two freezing hours outside if you're not hunting deer?

[BradMph]

If you need the part numbers off parts you need shown here, let me know. Was not sure if you repaired whatever that arm was thatV you needed.
7725
(click image for larger view)