Renegade ECM questions!

[goindeep]

OK fellow Joyner people! I have a Renegade R4 in the shop right now. The man brought it to me as a "no start"... he said he went trail riding and got it stuck very bad, he left it overnight. The next morning went to get it and it wouldn't start.. he drug it home and somehow came to the conclusion it needed a new ecm... he gets a new one hooked it up and still no start... this is when I get it.. the ecm is laying in the floor and the two ground wires are not hooked up.. I ground the two wires and boom it starts up.. but only running on two cylinders. From what wire diagrams I can find the trooper has two coil drivers and the renegade has three. I have checked the coil and all the wires and all is good. I am not getting pulse from the ecm for the third coil... the old ecm cover was sitting in the floor so I compared the numbers, totally different! Called the place he ordered the ecm from and they are telling my the old number superseded to the new one I have. I checked the ecm on my trooper and the numbers match perfectly. So what I am saying is the new ecm they sent is a match for a trooper ecm... are they the same?

Thanks for any help!

Josh

[goindeep]

OK fellow Joyner people! I have a Renegade R4 in the shop right now. The man brought it to me as a "no start"... he said he went trail riding and got it stuck very bad, he left it overnight. The next morning went to get it and it wouldn't start.. he drug it home and somehow came to the conclusion it needed a new ecm... he gets a new one hooked it up and still no start... this is when I get it.. the ecm is laying in the floor and the two ground wires are not hooked up.. I ground the two wires and boom it starts up.. but only running on two cylinders. From what wire diagrams I can find the trooper has two coil drivers and the renegade has three. I have checked the coil and all the wires and all is good. I am not getting pulse from the ecm for the third coil... the old ecm cover was sitting in the floor so I compared the numbers, totally different! Called the place he ordered the ecm from and they are telling my the old number superseded to the new one I have. I checked the ecm on my trooper and the numbers match perfectly. So what I am saying is the new ecm they sent is a match for a trooper ecm... are they the same?

Thanks for any help!

Josh

[goindeep]

Sorry I don't know why it post twice but the other one has pics.. ignore this one plz

Josh

[Guest Lenny]

If the numbers are the same, they are for the Trooper and that would explain the running incorrectly. Otherwise, the ECU looks for information from the tach and cam positon sensor to initiate spark. You might check there for a bad connection. Make sure your grounds are solid to the engine and ground the exterior of the ECU.

Lenny

[plumber]

#2 S11-3605010TA R2/R4 800 372ECU 1 561.35 #2 S11-3605010JA Trooper ECU 1 709.10

I would say yes they are different the last two number are different and the price are different

[goindeep]

I thought that would be the case. No Limits in Dallas is arguing say that's the right ecm for the renegade...

[Kinarfi]

Trooper's 4 cylinder engines have 2 up and 2 down as any one piston is at TDC, are the cylinders staggered on the 3 cylinder renegade, if so, there is no way a Trooper ECM would work.

[goindeep]

thanks for all the help! i did get it figured out and YES it was an ECM issue but we have it running like a top now!

Josh