Bought a CC Dually 454 Whipple

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Supercharged111

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Also had to repair the tire rack AGAIN. I've had many modes of failure. The latest seems to be spreading out the ends of the turnbuckles.

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From left to right is most failed to least failed. I upgraded to 3/8" turnbuckles. I guess we shall see what the next weakest link is.

Here it is fully loaded.

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Supercharged111

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So today the truck threw a P1335 (reference signal 1 circuit) and P1365 (something with the evap). If anyone has a schematic for the engine, it would help me narrow down what all sensors may be causing the issue. Truck was rolling coal and got the rear of the bed and the camper pretty dirty. Tailpipe is caked with carbon, I'd hate to waste the cats over this. I suspect when it does its thing, the MAP goes and reads max. On the other hand, it seemed to smoke when I was in PE mode. After a while it quit, but it did it long enough to make a mess and who knows if it wasn't running rich but not smoking the whole time as well.
 

Beeffajitas

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I have the Chiltons and Hayne's manuals. My wiring harness is currently pulled apart, so I could trace out whatever you want.
 

JSlezak83

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I can get you some more pictures from the service manual when I get home from work.
 

Supercharged111

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I can get you some more pictures from the service manual when I get home from work.

Actually remembered I had a Haynes on the shelf and for once it had the schematics I needed. Next move is to datalog. This problem is intermittent, so I'll datalog all things with a 5V reference to narrow down the culprit which I already figure must be MAP sensor related. Only problem is that, when I unplug it, it reads 10kpa. I was expecting it to read 105kpa as that would explain the pig richness. I need to datalog sensor voltages, could be that the PCM's internal voltage regulator is going wonky. I really hope that isn't the case as I need this thing working right as I have a long distance race coming up in less than 3 weeks, so 2 weekends to prep the race car and mend the tow pig.
 

Supercharged111

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I opened the harness and everything looked fine, so next step is to datalog. Windows should be done installing on the laptop now, so I'll go install EFILive and see what I can find. Also finally figured out the aux in on the Alpine my neighbor gave me so I'm no longer subject to the nonstop nommercials the radio stations play. Changed the oil today and put a new o ring in the oil filter housing. Turns out those plugs I tightened don't seal oil, they just keep crud away from the bolt heads that hold the adapter to the block. Much simpler task than on a 350 since the cooler lines go directly to the block.
 

Supercharged111

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Borrowed a Snap On Solus and pulled the freeze frame data. When the PCM throws a code, it also takes a snapshot of a bunch of PIDs. The Snap On will graciously show you these PIDs. I noticed that the evap code posted at 4 seconds of run time, exactly when the 5V reference signal code did. Now the evap code is constant, it never goes away, but the 5V reference code is intermittent. Because they both popped at the same instant I began to think perhaps they were somehow connected. The schematic doesn't indicate that, but they did come into existence at the same time. I'd never seen either code until I pulled codes after my last race. I removed the PCM pins and pulled the cover to have a look at the evap pin and ohm it end to end. What I found was a pin that was partially smooshed shut and on the PCM side it had shoved that pin in, which pushed it into another pin inside the PCM. None of it correlates to my problems, but an AC recirc door shorted to a camshaft position sensor wire and a TCC brake switch wire can't be good for business. I took the PCM apart, cleaned the corrosion from the case, ohmed the pin to verify it was making contact, and put it all back together. Tomorrow I'll go back out, solder in a new pin to the harness, reinstall PCM, clear codes, go for test drive. If they come back, I'll swap in a new evap solenoid that I have on hand. I'm beginning to wonder though if the thing it's looking for only rides on 98+ cans? You know, the one that mounts to the can? If that's the case I need to figure out how to smartly delete it because I'm not going through the asspain of swapping in a tank with a pressure sensor, especially seeing how I had one compatible today and just scrapped it.
 

JSlezak83

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I think you might be on to something there. Wasn’t it 98+ that ran the fuel tank data through the PCM? Might need a flash to delete the EVAP monitor.
 

Supercharged111

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Yeah, my 1500 has all that, but here's the real kicker: the 99 3500 I scrapped had that style tank and newer style charcoal canister, but didn't have the in tank pressure sensor. I'm guessing the GMT800 HDs did have the in tank sensor? Gotta wonder if the 5.7 vans did or not.
 
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