I have a 1994 850 T-5. It cranks but will not start.

I also have a second 1994 850 T-5. It runs fine and I am using it to troubleshoot the other one.

Here is what I have done so far:
Swapped ECU's.
Swapped cam and crank sensors.
Swapped Coils.
Replaced the fuel pump and relay.

I get no spark from the coil at all. The coil is getting power. The fuel pump is working great and I get plenty of fuel pressure. I have an OBD II reader. It says code p0120. Is the TPS enough to cause no spark at all? I have heard that it could be caused by a problem with the alarm system. I have no remotes and simply use the key to lock and unlock it. I bought this car non-running. The previous owner said that the dealership had it running with a new computer. (most likely a lie)

Any help would be greatly appreciated. I am getting to my wit's end.

 

I know they will stop the car from running.(TPS)

 

I swapped the tps out and still no start. I did notice that when I crank it, the tachometer does not move at all. Would this be indicative of a bad crank sensor?

 

That might be a cam sensor.

 

it is your cam position sensor and make sure u set the wires away from the rpm sensor causes communication problems or either check your injection relay located by the coolant fan. 94 has three modules ignition fuel and trans. depends if u have a regina system

 

My only issue with the cam sensor is that it still does not start with the other car's cam sensor that works fine in the other car. Are there different type of cam sensors? The one that was on the car is silver and the one that works has a black plastic cover.

 

They are the same ones.
Check the wires at the Green looking relay on top of the cooling fan. Sometimes the wires back out and cause an issue.

 

I checked the fuel injector relay and all of the barrel connectors look good. I am still getting the p0120 code as the only code. I may need to go through the wiring as well to look for continuity. I will post up any new findings then. Thanks for all the help, guys!

 

Quick update: The code I am still getting from OBD II is P0120. I cannot get the OBDI port to give me any reading at all. The light is just either dim or bright when I push it. No flashing at all. I also have the infamous flashing arrow on the dash board.

 

Maybe good news. I took the transmission out of the bad car and put it in the good car. Now the good car won't start. The other car has a dead battery so once it is charged, I will try to fire it up. Everyone cross your fingers!

 

WOOOOOOOOOOOOOOOOOOOOOHOOOOOOOOOOOOOOOOOOOOO!!!!!! !!!!!!!!!!!!!!!!!!!

It's alive!!!! It was a bad transmission computer. It fired right up. Lots of lifter tick and some rough idling, but nothing some Seafoam, plugs, wires, cap and fresh oil won't cure.


A HUUUGE thanks to everyone who contributed! You guys rule. This is why I keep getting Volvos. I will post up pics of the 850's real soon. Not too bad for $500 each!

 

Congrats!!!!!