The heading says it all. Struggled all day today to get all the work completed that will allow the start of the 5.3 Chev conversion. Just a big clunk but all the lights on the dash seem to work so far. It has been brutally cold in my garage and I only turn on heat while working in there. I think the battery is not up to par so it is on charge for now and we will see. In the meantime I will ask the electrical guy at Motech how to bypass the starter interlock circuits just to see if the starter will turn the engine. Anyway I am sure it won't take long to sort out and make some noise.

 

Brrrrr… been there and done that.... no fun. Hopefully you will get spark soon and be able to warm up!

 

UPDATE: Left the battery on charge last night and hit starter this morning. More stuff happened like the starter solenoid got interested and PRNDL light on dash worked (was a manual before so signal is coming from Chev TCU) but no turnover of the engine. Got home tonight with charger on all day and it just clicked and lights flickered so battery is pooched. Will buy a new one tomorrow as it was snowing heavy here so getting home is where the journey ended. More to come but really encouraging to see things working. That Motech wiring kit was almost 98% plug and play with a few interconnects from Jeep to Motech under hood and a CANBUS interconnection from Jeep to Chev behind the instrument panel. All very simple.

 

Anyone know where a JK gets it's speedo signal from? I suspect the wheel sensors as there is no cable that goes from TC or tranny to the computer.

 

UPDATE 2: New battery now makes engine kick over but does not fire. A small squirt of ether has it interested in firing (not using much here to avoid damage) so I would take that to mean the ignition is working. I will see if there are any codes but first I will check to see if the stock Jeep pump is working by placing the fuel line at the engine into a gas can and turn on the key. Do the basics first. More to come ......

 

UPDATE 3: The key on turns the fuel pump on momentarily for about 3 seconds. this gives the fuel rail enough pressure to allow the injectors to start the engine. If the system does not see a tach pulse the FI high pressure solenoid shuts off the fuel to the injectors (in the case of the direct injection engine) which in turn results in a crank but no start. This is where I am at now trying to get the pulse from the Jeep tach to the Chev ECM. At present the tach needle does not move. Motech and I are working on it. Tried the interface module dipswitch settings change tonight but no luck yet. More to come.

 

UPDATE4: The issue is/was the Mocan module was wired for a Gen IV engine whereas mine is a Gen V. Will change one set of wire pinouts on one 20 pin plug under the hood and see what happens tomorrow afternoon.