Skip the auto shop - Our mechanics make house calls

Q: will crank but wont start

asked by on

the 96 engine was put in a 99 key was misplaced mechanic who put it in has not come back went to dealer to get a key using the vin on the truck got vehicle to crank but wont start. plugged in a coder and came back A Bus that the computer is fried. Got a computer for 96 dodge ram 2500 v10 put in same thing came up. The new person that I had put in the computer from the salvage yard is at a loss. I have researched a little and think that we didnt match numbers of the truck vin that the 96 came out of to the computer we got and maybe something with the starter and key I got from the dealer with the vin on the 99 truck. Dont know where the mechanic that put the 96 engine in the 99 left off got the same A Bus with the replacement computer What needs to be done. The second mechanic says he checked fuses crank sensor and also battery sounds like its going dead. Dont think this mechanic wants to figure it out. What needs to be done.

My car has 88000 miles.
My car has an automatic transmission.

A: Ill try to answer this without getting too ...

Ill try to answer this without getting too technical. Your vehicle uses two network communication circuits, called busses, to communicate with all the different modules. Like any circuit, it requires a complete path with no breaks to operate. It is easy to miss connecting a small wire when performing a large job such as an engine replacement.

I suggest you refer to the factory service manual for detail information about were your grounds are connected and test procedures to verify that all modules have both power and ground source as well as a complete communications pathway. A missing or improper ground will prevent your modules from communication and is often misdiagnosed as a bad module.

A certified technician, like one from YourMechanic.com, will have the tools and knowledge to diagnose your starting issue and verify the proper operation of your can bus circuits.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Battery runs down after car is idle

Hi there! Your problem sounds like an issue with your charging system; more specifically, the alternator. The alternator is a major component in the charging system whose job is to maintain the battery charge during vehicle operation. Something as simple...

Q: Power steering leak on a '95 Dodge Ram 2500

You've got to find where the leak is coming from. Power steering pumps put out 1500 PSI or more at times. So, wherever the leak is, you are going to see it squirting out. From there you can figure out...

Q: Gasser to diesel?

Hi there, thanks for writing in your question. As with any project, anything is possible with the right amount of money, patience, and time. I have seen a few of these conversions done, and there are kits out on the...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.