Howdy guys,
I posted this on the VW Vortex, but thought I would find a dedicated Jetta forum as you guys really know the in's and outs on these Jettas.
A little history: I've been a VW nut for over 30 years, starting when I was very little. I've had a wide range of different VW's, mostly air cooled. I've had at least 10 Rabbits too. Now I just got this car.
It's a 1996 Jetta GL 2.0l Automatic. I bought the car as a non runner, and traded a 42" Plasma TV for it.
The PO owner told me she was in a car wash and the car just died... Wouldn't restart.
So, with that said, I'm going to copy / paste my thread from the vortex here, and see if you can make any sense out of it.....
Pasted from The Vortex: (Replies to thread will be in bold)
My 1996 VW Jetta GL 2.0l automatic will not start. I have replaced the coil, Distributer, Crank position sensor. I have tested all the wires back to the ECU for failure. All check out.I am only getting 1.5v at the crank position sensor. I can not tell if it's sending signal from the trigger wire. The tach moves up a bit when turning it over.
I have a second ECU that came with the car (Bought it non running) The other ECU doesn't power up the solenoid at the throttle body, nor does it make the RPM gauge move up when cranking over.
The Check engine light comes on on both when you turn the key on.
Now, what voltage am I supposed to get at the Crank Position sensor? Shouldn't it be 12v and the trigger be 5v? I know you need an LED test light, logic probe or oscilloscope to see the sine wave.
My feeling is that the ECU is not providing the proper voltage to the CPS, thus not allowing the car to start. Everything is new.
What are your thoughts?
Get code reader and read codes.
I searched the forum and didn't find.... Can you pull the codes any other way then buying a tool? If not, I'll have to beak down and buy one.
So the car cranks but doesn't start.
Do you have fuel? (need to measure fuel pressure)
Do you have spark? (need to hold a spark plug w/wire attached to a ground and crank)
Do you have air? (need to do a compression test)
Do you have all of those at the correct time? (check timing marks)
Getting codes might move things along but you might check the above first.
Sorry, forgot to list that stuff...No, I do not have spark
Yes, I do have proper fuel pressure
Yes I have proper compression
I'll double check the timing.
Besides a possible partially dead ECU, I guess the timing being off would cause the crank position sensor and pulse generator in the distributor not to mesh, thus causing a no start situation from the ECU.
I'll check the timing today and report back.
This is a great little car I traded a 42" Sony plasma TV for...hehehe
Pics for clix.
Okay, sorry for the delay.I replaced the timing belt and re-indexed the timing... Was 3 teeth off. Did not smack any valves thankfully.
Still didn't start.
So, I spent another $75 bucks on a good tested ECU.
Still won't start.
So, here's the question, I seem to have proper voltage to the Coil, But the crank position sensor only has 1.5v to pins 1 and 3. Shouldn't it be 5v? I'm getting my Bentley this Friday, should help alot. But if anyone has a recommendation that would be great.
So to summarize:
Replaced parts...
Coil
Crank Position Sensor
Distributor
Timing belt and set timing
ECU
I don't know what else it could be? Like I said earlier, I checked every wire back to the ECU, they seemed fine with an ohm meter. But maybe I was reading it wrong.
And that's where I stand at this point.
Any help would be great!!
Thanks,
Doug in Oregon
I posted this on the VW Vortex, but thought I would find a dedicated Jetta forum as you guys really know the in's and outs on these Jettas.
A little history: I've been a VW nut for over 30 years, starting when I was very little. I've had a wide range of different VW's, mostly air cooled. I've had at least 10 Rabbits too. Now I just got this car.
It's a 1996 Jetta GL 2.0l Automatic. I bought the car as a non runner, and traded a 42" Plasma TV for it.
The PO owner told me she was in a car wash and the car just died... Wouldn't restart.
So, with that said, I'm going to copy / paste my thread from the vortex here, and see if you can make any sense out of it.....
Pasted from The Vortex: (Replies to thread will be in bold)
My 1996 VW Jetta GL 2.0l automatic will not start. I have replaced the coil, Distributer, Crank position sensor. I have tested all the wires back to the ECU for failure. All check out.I am only getting 1.5v at the crank position sensor. I can not tell if it's sending signal from the trigger wire. The tach moves up a bit when turning it over.
I have a second ECU that came with the car (Bought it non running) The other ECU doesn't power up the solenoid at the throttle body, nor does it make the RPM gauge move up when cranking over.
The Check engine light comes on on both when you turn the key on.
Now, what voltage am I supposed to get at the Crank Position sensor? Shouldn't it be 12v and the trigger be 5v? I know you need an LED test light, logic probe or oscilloscope to see the sine wave.
My feeling is that the ECU is not providing the proper voltage to the CPS, thus not allowing the car to start. Everything is new.
What are your thoughts?
Get code reader and read codes.
I searched the forum and didn't find.... Can you pull the codes any other way then buying a tool? If not, I'll have to beak down and buy one.
So the car cranks but doesn't start.
Do you have fuel? (need to measure fuel pressure)
Do you have spark? (need to hold a spark plug w/wire attached to a ground and crank)
Do you have air? (need to do a compression test)
Do you have all of those at the correct time? (check timing marks)
Getting codes might move things along but you might check the above first.
Sorry, forgot to list that stuff...No, I do not have spark
Yes, I do have proper fuel pressure
Yes I have proper compression
I'll double check the timing.
Besides a possible partially dead ECU, I guess the timing being off would cause the crank position sensor and pulse generator in the distributor not to mesh, thus causing a no start situation from the ECU.
I'll check the timing today and report back.
This is a great little car I traded a 42" Sony plasma TV for...hehehe
Pics for clix.
Okay, sorry for the delay.I replaced the timing belt and re-indexed the timing... Was 3 teeth off. Did not smack any valves thankfully.
Still didn't start.
So, I spent another $75 bucks on a good tested ECU.
Still won't start.
So, here's the question, I seem to have proper voltage to the Coil, But the crank position sensor only has 1.5v to pins 1 and 3. Shouldn't it be 5v? I'm getting my Bentley this Friday, should help alot. But if anyone has a recommendation that would be great.
So to summarize:
Replaced parts...
Coil
Crank Position Sensor
Distributor
Timing belt and set timing
ECU
I don't know what else it could be? Like I said earlier, I checked every wire back to the ECU, they seemed fine with an ohm meter. But maybe I was reading it wrong.
And that's where I stand at this point.
Any help would be great!!
Thanks,
Doug in Oregon