Tim Waldo

SO... on my way to an interview this morning.... phone connected to radio by bluetooth, listening to my book and received a text message and the truck went WILD!!!! computer thinks tach jumped to 4grand...(it didn't) showed on my Edge Attitude.... and then truck dies.... I let it set all day while I'm at interview and I start thinking.... I installed the stereo about August of last year, I started throwing codes about August of last year. I get home, go back to the truck, pull the radio, start the truck and drive it home (tach dead). Get home shut truck down, clear the codes, start truck back up with scanner attached.... COULD NOT GET IT TO THROW A CODE!!!!! TRIED... Yesterday was throwing a code every couple of minutes... Tach working, truck running.... Radio sitting in passenger seat. Granted its going to take a lot more time and some guarded driving trips close to home, but I think the BLUETOOTH in the stereo was putting out a bit to much signal for my ECM's taste. Never got to test for floating AC voltage, but I'm betting on that being the issue. What do you guys think?? Tim

Put the code reader back on the truck just to watch... this is what I saw... does it give any more insight? The truck was sitting still. on left the engine speed is off by 4 on the two sensors on the right they are matched at 827rpm Just looking for more definite problems before I do something that intimidates me. Tim

Thank you for the clarification... whats the best way to access the ECM then? from top or bottom? I'm going to clean up that area of the engine and dig a bit deeper into everything on Monday.... Yeah... I put off tapping the pump and one day the mood just hit me.... I instantly regretted it... I don't really think that is my issue but if everything else checks out I may have to dig a bit deeper into that one wire.... and if I do get the urge to tap the pump again.. it WILL be with a stealth plate... not that I really need the extra power, but the MPG boost might be worth it. Tim

Ok... Tried to look today... My ECM has 3 30 pin connectors.... had the FPCM connector off, found the dark green wire... could not get it to test to anything on any of the ECM plugs...all the wires looked.... ok... your document referred to an ecm in front of the lift pump.... I found something there but couldn't see any connectors to it... Which is my ECM?? While I was looking around, I did notice the two wires referenced when I installed my Edge Juice.... I did last year try to tap the wire but failed... could I have damaged one of those wires... if so can I replace it? They looked ok... but who really knows if I punctured the sheath and there is corrosion on the wire now... Thanks, Tim

SO which one do you think I should start with? I forgot to mention a FASS lift pump... which is wired to Key Hot so the lift pump relay has NO load on it... which should I troubleshoot first 0336 or 1690 ?? Thanks Tim ps Glad to see you got the forum up, DTR seems to have died

Ok... just to be clear... new crank and cam sensors are installed....... and what exactly is a hobb switch?

So I've been throwing P0336 error codes since last September.. after I had the Crank sensor replaced... Take it back to the shop that replaced it and had them do a diagnostics on the sensor... this is what they got... P0230 P0336 & The code of the day..... P1690 My lift pump circuit cut out last fall and I bypassed it to be key on powered... My backup light voltage is only 7v (didn't know until I started checking that this is driven from the ECM) I disconnected it. I've read all these posts.... what is this bypass/dummy plug?? Are these the droids I'm looking for?? What should I be doing next?? With the drop in voltage at backup light and loss of lift pump trigger voltage I'm thinking ECM dying... Don't really want to go there.... Thanks, Tim 2000 3500, 5spd, 360k miles, new tranny, Juice w/Attitude but pump not tapped just using the guages