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.

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
  1. Home
  2. Questions
  3. will crank but wont start

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Joe I am having an issue with my 1997 Dodge Ram 2500 5.9L Cummings motor, motor would not start I changed fuel filter it started r

Hi there. It is possible that the fuel filter change may be the cause of your hard to start issue. If the fuel filter is either the wrong size or was installed backwards, it would cause a restriction of diesel...

Q: My car won't start and the word fuse is lighting up on my cluster. What does it mean?

Hi there. The fuse light will come on if the engine is not starting up for more than 15 seconds. This is a fail safe light that warns the driver that the starting circuit has a fault and needs attention....

Q: Electrical issue in car

Hi. You have two coils on that engine that sit atop of the cylinders, and two plug wires going to the others. A common spot for high voltage leaks are the boots attached to the coils. Check closely for grey...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...