Q: 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?
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. Q: 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: Leaking oil out of the front..not from the blow by hose

Hello there, many common faults will cause your 2001 Dodge Ram 2500 to leak puddles of oil while the engine is running. The most common causes are the oil pan gasket, front crankshaft seal, crankcase breather or valve cover gaskets....

Q: Q: Stuck in park

Your shift cable is likely jammed, frozen, or broken; a visual inspection can verify which one is the cause. A qualified technician, such as one from YourMechanic, can come to your vehicle's location, run a diagnostic inspection of your shifting...

Q: changed the fuel pump on 1999 dodge ram 2500 diesel fuel truck. Now, it doesn't send power to fuel pump.

At key on, the fuel pump is normally only powered momentarily to pressurize the system. If you are testing during this brief interval, you have to apply a volt meter at the instant the key is turned on. Otherwise, the...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.