2nd Generation Dodge 24 Valve Powertrain

I've been starting the engine with the grid heaters disconnected for 6 weeks with morning temps ranging from 28°-55°F with just a little white smoke and a loping idle for about 30 seconds. This afternoon, after my wife drove it this morning, the check engine light was on. I scanned the system with an OBD code reader and fond this, P1291 No temp rise from intake heaters. Monitor & Set Conditions Temperature rise from intake air heaters is monitored for first 15 seconds of engine operation. DTC may be stored if initial Intake Air Temperature (IAT) sensor reading is 0-66°F (-17.8 to 18.8°C), Battery Temperature Sensor (BTS) and IAT sensor are within 10°F of …

So yesterday I pulled a trailer weighing approximately 6k-7k pounds that had most of my tools and some household junk in it. I decided to put the truck back to stock programming since I don't have a pyrometer installed. After flashing the ECM back to stock just for grins I checked for fault codes and have a p1488. I reflashed the ECM and still have the P1488 that won't clear. The truck runs fine and doesn't have a CEL so I'm sure it'll be an easy fix. I haven't dug into it but I suspect I'm going to find a bad MAP or CMP sensor or possibly bad wiring.

2001 25004x4 5 speed started out truck ia a base model had no Cruise control! I installed a new criuse clockspring and new cruise switches now the cruise light will quickly flash on when I turn it on but won't stay on also I've never had any problem with codes and now I got a code1595 speed control solenoid! Do I have one of theese with a manual trans? I thought the PCM runs the cruise. Any help would be great! Thanjs

Well after installing my gauges and DDRP I finally got the P1688 "dead" code. My gauge still wasnt showing as much pressure as I thought it should have (12-15 idle...I could pull it below 5 with throttle). I'm pulling pressure thru top filter housing from outlet banjo thru a snubber. I assumed I should swap the filter anyhow. Regardless after I got up to temp, the truck stalled. When hot and bumping the starter the lift pump didnt seem to be running. Had no pressure and no start. I pulled code to get the P1688. Can the VP code cause the lift pump to not run (when hot)? After a few hours, I started truck and drove it to the house. Same pressures 12-15 at idle.I'…

Injection Pump Failure. Time to do some work to my truck. I'm just posting up to ask for recomendations in Fuel Pressure Gauges, and Aftermarket Lift Pump improvements. I'm hoping to make the repair in my home garage, so the easier to install options would be a plus. I see many writeups on the job, but any tips would also be welcomed. At this time I am leaning towards an airdog 100 lift pump. Thanks in advance for any information. Dave

I’m getting a recurring P1688 controller failure on my VP44. However, it’s easily cleared and the truck runs just fine. Could it just be the PSG is slow to boot up? Codes: 1688, 1693 companion Code reading/clearing method: Edge JwA Two scenarios 1. Turn the key on, 1688 is active, clear it, then start the truck without ever turning the key off. CEL never reappears as long as the truck is kept running. Idle is 800 RPM, idle load is 5% with new RV275s from DAP. The 1688 will never come back until the truck is turned off and back on. Runs great. 2. Turn the key on, 1688 is active, do not clear it, start the truck, leave the CEL on. Idle is…

Well we all know what this code means. I have been fiddling around under the hood a lot lately and I wonder if I bumped something that could cause the code? Truck still runs ok but seems like it got a bit louder as far as the typical knocking noise. Is they’re any other symptoms that show with this code? I honestly hope I have to do a vp because that could be cuasing a few small issues of been having for a while....

Did some searching around and figured I would post my experience here. Alot of people replacing the VPs over this it seems like. I went onto the dealer site and found the diagnostic tree for this code. Nowhere does it say replace the pump. It says either electrical/wiring issue which I understand could be the circuit in the pump, or the ECM. Personally I am assuming my circuit board is fine and I have a problem elsewhere. I live where there is an issue with rat damage. My pump is tapped for the Edge. I had a spare APPS to try. I tried the relay swap that moparman suggests. I cant fully rule out alternator noise but i have the BD kit and keep that ground wire r…

First of all, Thanks to Michael for taking the time today to help me out, I just started working on troubleshooting the harness to see if its the problem

Lost lift pump and this morning I have the p1689 code. Truck still starts but guess the airdog took out the injection pump also. I think that it is just barely under warranty. Ill have to check.

I'm confused I am try to figure out where my communication problem .I have done the tests that i got from here and when I do the check to ground on the white and black wires my gauge does not move at all. I was looking around online and I saw pretty much the same test but the color of the wires it said to check on post 1 and 2 on the FPCM are totally different. My wires are one white and one black and they are together in a shielded cable in the wiring harness with the others for the FPCM is this correct? I have a 2001 2500 quad cab long bed 2wd with auto transmission.I have replaced the lift pump and the VP44 it will crank but NO START. Thanks in advance for any HE…

Found this trouble a couple of places but no for sure solutions. Mileage on truck is 87,453 and is stock all the way. No trouble in the past. Just Oil, filters, tires and battery. Bought new in late 1999. Old and retired but I like my truck and need to fix it soon so help. Replaced the lift pump and filter, checked the APPS voltages and are OK, engine starts quick and idles perfectly. Touch the accelerator pedal and rpm jumps to approx. 1400 and that is all. Foot off pedal, goes back to idle. MIL (engine light) on & all other lights work normal. Wait to start on and times out as usual. Code P1689 is all that reads. HELP PLEASE.

My profile explains everything. I am a “diesel dummy” but need a little help to finish diagnosing. I want to check the harness from the ECM to the injector pump. I see where it connects to the injection pump then the harness goes into a main loomed harness. I have probably over looked the ECM but where is it so I can check the connector and pins. Any pictures would be a great help. Thanks

Hey guys, This is my first post over here. Id like to thank Mopar1973Man for having this forum and for all the information he contributes. The trouble code walkthoughs are an amazing resource. I am trying to resolve P1689 and P0215 DTCs. Truck: 01 QCLB CTD Auto 4wd. Pertinent upgrades: FASS system 95gph, smartry and original quadzilla adrenaline. There are lots of other upgrades, but none that should relate to my question. Backround: Truck was sitting for the better part of two years. When I stopped driving it, it was running well. When I came back to start it again, I had a no crank issue that ended up being a bad ignition switch.…

Truck seems to "cut out" at higher power output... The cut out of power is abrupt and harsh, as if the engine just shuts off for a few seconds until I let the throttle down. It also has been taking an extra second or two to start. Any ideas guys? Thanks. Here we go again.

So I have read everything there is about this code and parts and followed a lot of steps of troubleshooting! But my question is has anyone done the re-sauter of the transistor inside the vp44 and did it work? I know it’s either my vp and or the ecm. Just still trying to get a good idea on which one to drop the cash on. So so after new fuel pump(17 psi now ??), filter,apps, and a lot of ground wire chasing the truck starts fine but low idle around 6-700 rpm then if you hit the throttle no matter very lightly or peg it to the floor it jumps to 1400 and stays.

Good morning, I bought what I thought was a good deal of a truck during the pandemic, a 1998.5 3500 auto dually. This forum has been very helpful thus far but I feel like I have hit a bit of a wall and was wondering if anyone had any suggestions before I go down too many rabbit holes. Currently my truck is showing a P1698 code, which can be cleared but immediately returns. It s very hard to start but will get going, rev and not throw the code when in park or neutral. As soon as it is in gear and a load is applied the code pops and the engine derates. After installing the new vp44 it was running and staring very well. P1689 started suddenly on my wa…

Alright so I've got this 24v project im working on - don't have any exp on them and I heard this is the spot to go... Trucks got p1689 flashing, p0113 codes. Previous owner said it "wouldnt go above 20km/h". I havent tested that theory because I suspected the lift pump. I have a FASS100gph & set of glowshift gauges going in this thing shortly but I wanted to confirm the source of these codes before i mess with them. I also am having, what I believe to be the sending unit act up on me. Fuel gauge at E, but when I disconnect / reconnect connection at top of sending unit it jumps up to half then slowly climbs down. Tested the gauges on the dash, and fuel gaug…

So I'm gonna be as thorough as I can, but sorry if I'm vauge.. Truck ran fine, had the Smarty on it, rolling coal...did some brakes and ball joints, let the truck down off the jack, cranked it and started white/blue smoking...dont really recall was kinda worried, shut it down, limped him home and parked. Later got it cranked, parked for months, drove it about 45 miles, lost compression in 3rd, downshifted and caught boost, got it where I was going, parked it again...didnt have the money to fool around with it... 8 months later....got batteries charged, oil filter, fuel filter, and air filter Was running and smoking...dash and all on, odometer reading 5…

Threw P1690 and P0336 last Sunday night before I went away for a few days (not in the truck). I just started combing the threads and Mike's articles, but haven't done any actual troubleshooting yet. Just wanted to open up a thread in case I need some pointers if I can't find in the other threads and articles. Basic symptoms at time of occurrence, though, were the tach started jumping around and then was running rough. I had seen my tach rough idling the few days preceding the codes. When the codes appeared, I was less than a mile from home, and turned around and got her home with no issues. Just got back today from a little time off and the truck did start, and the codes …