Dan2014 Posted October 11, 2014 Share Posted October 11, 2014 1999 Mack, ch613 I just did in frame overhaul. It starts and runs great!! But... won't accelerate. I press pedal to give it more diesel and it won't do anything. Just sits and idles. Anyone have any ideas??Only thing on dash says...... Electronic Malfunction Thanks!!! Quote Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/ Share on other sites More sharing options...
j_martell Posted October 11, 2014 Share Posted October 11, 2014 What motor? Electronic throttle control might be buggered.... 1 Quote Lack of planning on your part does not constitute an emergency on my part.... Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-262942 Share on other sites More sharing options...
Dan2014 Posted October 12, 2014 Author Share Posted October 12, 2014 Motor 460 Quote Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-262965 Share on other sites More sharing options...
gearhead204 Posted October 12, 2014 Share Posted October 12, 2014 check for a open ground I'm guessing one got missed on reassembly Quote Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-262970 Share on other sites More sharing options...
Dan2014 Posted October 12, 2014 Author Share Posted October 12, 2014 I don't think I took any off but I will sure check. Thanks!!! Quote Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-262975 Share on other sites More sharing options...
rsb502 Posted October 12, 2014 Share Posted October 12, 2014 On a 99 ch it could have been an etech or a vmac e7, need to get that narrowed down for sure. Most likely culprit on an etech is the throttle pedal wiring, on a vmac e7 would be the pump wiring around the Bosch connector near the pump. 1 Quote "Any Society that would give up a little LIBERTY to gain a little SECURITY will Deserve Neither and LOSE BOTH" -Benjamin Franklin"If your gonna be STUPID, you gotta be TOUGH" "You cant always get what you want, but if you try sometimes you get what you need" Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-262992 Share on other sites More sharing options...
Dan2014 Posted October 12, 2014 Author Share Posted October 12, 2014 Thanks! I will check this out in morning! Quote Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-263001 Share on other sites More sharing options...
Superdog Posted October 12, 2014 Share Posted October 12, 2014 I thought by 99 they were all ETECH engines. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-263005 Share on other sites More sharing options...
Dan2014 Posted October 12, 2014 Author Share Posted October 12, 2014 Thanks Superdog Quote Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-263033 Share on other sites More sharing options...
Dan2014 Posted October 12, 2014 Author Share Posted October 12, 2014 My Truck finally flashing a code!!! its flashing 64. Anyone help with this please! Quote Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-263044 Share on other sites More sharing options...
Dan2014 Posted October 12, 2014 Author Share Posted October 12, 2014 I have checked for loose or corroded wires and connectors. I have checked foot pedal. It there anyway I can check for fire to sensor at pedal to see if sensor working? I never messed with any of this stuff doin the inframe overhaul. I am puzzled over all this. Any help will be greatly appreciated. Quote Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-263048 Share on other sites More sharing options...
Macktech689 Posted October 12, 2014 Share Posted October 12, 2014 6-4 is the J1939 datalink, the high speed communication link between the control modules. Double check all the wiring around the engine and the triangle shaped connector on the firewall by the steering shaft, the 1939 wires are green and yellow. Quote Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-263050 Share on other sites More sharing options...
Dan2014 Posted October 12, 2014 Author Share Posted October 12, 2014 ok... thank you!! Quote Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-263051 Share on other sites More sharing options...
j_martell Posted October 12, 2014 Share Posted October 12, 2014 Get it sorted? 1 Quote Lack of planning on your part does not constitute an emergency on my part.... Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-263084 Share on other sites More sharing options...
Dan2014 Posted October 12, 2014 Author Share Posted October 12, 2014 No.... same thing! Is there anyway to check the sensor at the footpedal, and see if any good? Would the sensor make it do this??? Quote Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-263096 Share on other sites More sharing options...
Dan2014 Posted October 12, 2014 Author Share Posted October 12, 2014 All looks good! Wires, connectors, I tried to check sensor... it has no fire coming out of it. (OHMS). Ready to take to Mack but... that will be costly! Quote Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-263099 Share on other sites More sharing options...
rsb502 Posted October 12, 2014 Share Posted October 12, 2014 I thought by 99 they were all ETECH engines.ya know I believe your right, i think it was the 97's we had that were VMAC pump trucks not 99's. Quote "Any Society that would give up a little LIBERTY to gain a little SECURITY will Deserve Neither and LOSE BOTH" -Benjamin Franklin"If your gonna be STUPID, you gotta be TOUGH" "You cant always get what you want, but if you try sometimes you get what you need" Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-263104 Share on other sites More sharing options...
2stacksuperdog Posted October 12, 2014 Share Posted October 12, 2014 Our 01 RD with a 350 had a recall when new for the throttle pedal. The truck would run but not accelerate. Quote Matt Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-263109 Share on other sites More sharing options...
j_martell Posted October 12, 2014 Share Posted October 12, 2014 Throttle is likely ether a varible resistance switch or potentiameter (sp?). To check a variable resistance switch you need a multimeter set to ohms (not sure the range) and hook the leads to the throttle wires and test resistance from idle to WOT....some one here might have the values for high/low.....infinite resistance indicates an open circuit..... Quote Lack of planning on your part does not constitute an emergency on my part.... Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-263111 Share on other sites More sharing options...
Mackpro Posted October 13, 2014 Share Posted October 13, 2014 If its showing a 6-4 code and the idle is at 900 rpm and the throttle pedal wont respond then it really has nothing to do with the throttle pedal. As some one said above the 1939 wires are messes up some where. If the trans was pulled, there is also 1939 wires on top of the trans in thoses years. Quote Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-263153 Share on other sites More sharing options...
theakerstwo Posted October 14, 2014 Share Posted October 14, 2014 Does the 1939 harness use a terminateing 60 ohm resister at the end of the harness which on a freightliner will be located in the frame near the trans? Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-263200 Share on other sites More sharing options...
Moise Posted December 22, 2020 Share Posted December 22, 2020 (edited) Hi my truck go only 15mph but it change gear very well only when I change to 6 gear or more it make a little noise and I change the speed sensor the engine light go off but doesn’t drive no more then 15mph it 9400i international 2007 ixs does some one know what cause that cause i put a computer on it every it ok I mean engine turbo ejr Edited December 22, 2020 by Moise Quote Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-465942 Share on other sites More sharing options...
Vmac3 Posted December 22, 2020 Share Posted December 22, 2020 Check all the fuses for the engine and vehicle ecu first, an offline vmac module will set this code. The 6-4 code you are referring too is the J1939. This is used for communication between the engine ecu and the vehicle ecu (both vmac3 modules). The other modules plug into the backbone of the J1939 (auto trans, abs, and any other module). The vmac3 system did not have any external terminating resistors. They were built into the vecu and the engine ecu. To check the datalink, find the datalink connector, its under the dash on the driver side, beside the steering shaft. Disconnect the batteries, with your multimeter set to resistance, probe pins C and D. You should get 60 ohms. if its at 110 or 120 then you have an open circuit. The terminating resistors have a value of 120 ohms each. When they are connected in parallel the resistance goes to 60 ohms. Let us know what you find. V Quote Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-465964 Share on other sites More sharing options...
Joey Mack Posted December 22, 2020 Share Posted December 22, 2020 Just a thought.. is there a 6-5 code??? I think thats throttle pedal, wasnt there a re-set procedure in V-Mac soft , where you had to press the pedal three times to calibrate it? sometimes I had to do it a few times before it took.. yes I did this when re-programming a new E.C.M., just curious... Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-465968 Share on other sites More sharing options...
Hayseed Posted December 23, 2020 Share Posted December 23, 2020 You 2 Guys (Vmac3 & Joey Mack) do realise you've answered a 6 yr Old Question..?? Great Info, & insight though. You can never beat experience.!! Moise, Welcome. It's a Bit hard to solve your ISX Problem given the Info Provided (especially on a Mack Forum !!) Like Most things though. Best to start with the Simple little things First & work your way up from there.! How long since you've changed the Fuel Filter?? 1 Quote "Be who you are and say what you feel...Because those that matter...don't mind...And those that mind....don't matter." - Link to comment https://www.bigmacktrucks.com/topic/37346-truck-runswont-accelerate/#findComment-465972 Share on other sites More sharing options...
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