2nd Generation Dodge 24 Valve Powertrain

I went to smog my truck in CA and when the tech plugged in to the OBD2 his computer could not communicate with my truck. He asked if i had a tuner or something on the truck. After 3 shops all unable to read the OBD2 i am left scratching my head. Would flashing ECM or PCM help? Need to pass ASAP! The truck has never been tuned. but did have the ECM reflashed in 2019 by Auto computer specialists truck runs great. no codes. Any help would be great.

So the cap on the water/fuel separator keeps popping off. Replaced cap an it blew off again. So replaced filter an cap this time an made it a few more kms before popping the threads on the cap an its leaking again. Any ideas???

So recently I’ve been noticing when i leave in the mornings for work after letting my truck warm up, my coolant temp is never past 165. No matter how long I let it warm up. I Was hauling my horse trailer this morning it was 34° And the coolant temp never reached 190. Maybe touched it once on an uphill but otherwise no. Is this a problem? Stuck thermostat?

1998.5 24V It starts fine and quick, runs strong then the fuel pressure will fluctuate and it stalls. It will not restart. I found the fuel overflow valve is getting stuck in the full open. Replaced the fuel overflow valve but it keeps happening. If I push the ball on the overflow valve it will start again.

Found a 2nd hx35 that needs rebuilt. $50 + $30 shipping. Just bought a supposedly 50k zero shaft play hx35 but haven't received it yet. Would it be worth getting the 2nd one?

Can I use the moparmans high idle switch with the quadzilla xzt? I want the 3 cylinder high idle for my truck.

Curious if anyone could tell me if there would be any difference between a 99 ECM vs my 2000 ECM It it came off the same engine I.E. H.O. 6speed? Reason, I'm getting back into hauling trailers as soon as my freshly fused ankle allows me to, and FMSCA might require me to have an ELD(electronic logging device) not sure, because right now towaway operators are exempt for now, but 1999 and older engines exempt, not that I'll be worried about HOS but just an added extra monthly cost.

I have a 2001 (2nd gen. Cummins) 2500 4x4 SRW with the CAD system on the front Axle and needed a few questions answered. 1st post BTW and just joined..... The PO has disconnected the switch for the 4x4 at the CAD (the connector that plugs into the CAD). The switch/sender is still connected to the CAD but there is no connector anywhere NEAR this. I've looked up and down and it just is not there, so my question is, where does the connector plug into that runs to the CAD (i.e. as in where on WHICH wiring harness is it Tee-d off of)? Can a replacement be ordered and then just plug into the wiring harness on one end and the CAD switch on the other? Any pics showing both end…

I have had this issue for around 6 months or so. I will start from the beginning... Rebuilt transmission 1 year ago. 5-6 months later no lock up. Tested alternator Cleaned grounds Monitored transmission via snap on scanner Wired in lock up switch Added noise isolator Tested continuity on lock up cable to PCM. Tested apps Changed VB Changed solenoids Changed OSS Tested brake light switch All came back good Trans doesn't slip TC when it was locking didnt slip at all TC would lock up only if coasting whilst feathering throttle around 5% tps input. it would…

I’ve been trying to figure this out for a couple days now. I’m having troubles with truck running when pcm is plugged in. If I unplug C1 It will start. If I unplug C3 it will start but say I have C1 plugged in and plug C3 in kills it immediately. Same if it’s other way around. Could this be due to security? Please help

So I have a 1999 24 valve all stock no tuner.. and I can start the truck and it fired right up and it will idle around 800 or so rpm and when I hit the throttle it will idle at 1100 and at highway speeds the truck will buck and if I let off it’s fine until I get on the throttle again I just replaced tps/apps and set the correct voltage and done the pedal thing the map and iat sensor are showing they work on my scan tool but no codes I’ve only owned the truck for a couple weeks and the vp44 has a sticker on it and it looks brand new all my ground are good but idk what to do.....

So I'm in the process of putting the truck back together and I ran into an issue. My fass draw straw is oof the old design, the new fittings I got for my fass don't work with the fass95. So I was going to take the inner during on the draw straw and use that on the fass pump. But that leaves my draw straw. I was looking at getting the Fass Sump kit since it allows you to draw from the inside of the bowl. Being here in Jersey I don't foresee any issues with hitting brush, etc that could cause it it be knocked out. I refuse to use a sump that requires an external hose, as I'm currently dealing with an enlarged hole for my old draw straw. If your won…

Hello! This is my first post on here so pardon if I’m in the wrong subcategory. About a week ago, I developed a popping noise under take off, it sounds like it’s coming from under the drivers side floorboard to me. A buddy said sounds like under back passenger seat, under take off it sounds like a pop is coming from under the truck, have had it on the lift and have checked all u joints, they’re good. Back one going into the rear end had a strap that was coming loose, took it out and checked everything and put it back with locktite, it only does it after I’ve driven the truck for a few miles. I’m stumped, I’ve looked all around forums trying to find something and can’…

I'm looking for a little more h.p,how many more h.p with the HX,I have the stock injectors at 340,000 km probably good time to replace them what size should I go with the HX 35 turbo

2000 5.9 24 v auto trans truck was running ok the only thing it would do is an annoying what I call a searching for gears at low rpm or over drive...so was suggested to apps reset I did here’s where things get crazy problem was solved truck ran perfect for a day then the next day started Rpm real high to change gears and if I feather the pedal it would help now today start truck start going down the road stop at light I have nothing no reverse no forward so I restart truck gears come back over and over now...stumped no codes nothing and cleaned all terminals to battery....Please any ideas...?

My block heater is tripping breakers in the house. I ohmed it out and it falls in an acceptable range. It has been a while since I did it, but I think the reading was about 19 ohms. What ever it was, from the research I had done the reading was acceptable. I would think that if I had a rub thru in the wire that would give me an open reading. The extension cord I used to get there has been starting snowblowers and running circular saws recently with no problem. Any ideas? Or just replace it?

Hello I replaced my lift pump and IP but now I have a hard start issue because the cranking pressure is too much for IP. I now have a toggle switch to turn off the lift pump while starting. I have heard of a way to install a relay to delay the lift pump until the engine is running, is there a link on here for the instructions? Thanks

It won't be long and it'll be that time. I recently bought this truck, previous owner used regular rotella. I am considering full synthetic rotella oil. In the manual it says 7500 miles between changes, would that extend if synthetic is used? For those of you that run synthetic, what interval do you change yours? Just a curious question to see if the extra expense has more advantage than just better oil. Thanks

So I left my truck sitting for about a week while I was on vacation. I try to start it up for the first time and it'll crank all day but won't fire. My gauges aren't working, my odo is flashing my mileage, and my lift pump isn't getting any power. What do I need to look into besides checking all the grounds and fuses? Does this sound like a bad ECM/PCM? Thanks for any help. The truck is a 1998.5

Good afternoon everyone, Got a few questions. Last year April 2019 I installed DAP 100hp injectors and noticed what I thought maybe an odd low knocking noise at idle. My truck is the only cummins diesel I've owned and I'm no pro at knowing diesels. As the year went on the sound seems to have gotten more noticeable. Below are two videos. Do you guys think it's an injector knock or something worse? Engine load per Quadzilla is around 10% at idle with rpms around 800. Fuel pressure is steady at 15-16psi. Let me know your thoughts. Thanks, Tim