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  #1  
Old 07-26-2007, 04:47 PM
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Join Date: Jun 2000
Location: Saugus, CA USA
Posts: 2,042
1991 190E 2.6 died 3 times for a few minutes

Almost didn't make it back from lunch today. Stopped at a stop sign and the engine died while it idled. It sat there for about 5 minutes while I poked around under the hood and cranked ocasionally then started right up and ran fine. A few miles later it quit again while I was driving (managed to coast past the railroad tracks.) Again sat for a few minutes then it started. A mile later I pulled into work and it quit again just as I pulled into my parking spot, and wouldn't start, but then I didn't need it.

My only indications are I could hear the fuel pumps run for a second when I turned the ignition on, it cranks fast (good battery) and gives no indication of firing while I crank, and when it quit while I was driving the tach went to zero even though the engine was still turning while I coasted.

I've heard rumors of the OVP doing this kind of stuff, is that the thing behind the battery with a fuse on top?

Anything I can do, check, fix while at work?

I'm expecting an adventurious drive home.

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5 speed '91 190E 2.6 320,000 mi. (new car, fast, smooth as silk six, couldn't find any more Peugeots)
5 speed '85 Peugeot 505 2.5l Turbo Diesel 266,000 mi. (old car, fast for a diesel, had 2 others)
5 speed '01 Jetta V6 (new wifes car, pretty quick)
5 speed '85 Peugeot 505 2.2l Turbo Gas 197,000 mi. (wifes car, faster, sadly gone just short of 200k )
5 speed '83 Yamaha 750 Maxim 14,000 mi. (fastest)
0 speed 4' x 8' 1800 lb Harbor Freight utility trailer (only as fast as what's pulling it)
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  #2  
Old 07-26-2007, 05:00 PM
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Join Date: Aug 2001
Location: Houston, Texas
Posts: 393
Assuming your car is similar to my 87, 260E. Maybe disconnect the coolant temp sensor connector from the sensor. If it starts without it great, if not, let it start and then take it out. It should put the car into a limp mode which I am assuming should be a high reliability low performance mode of operation. Will get you safely across the railway tracks, I hope. I am not sure where it would be on your car, but on my 87, 260E, it is the last sensor on the engine, towards the winshield, on the intake side. It is a two terminal connector.
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Saumil S. Patel
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  #3  
Old 07-26-2007, 08:58 PM
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Join Date: Jun 2000
Location: Saugus, CA USA
Posts: 2,042
Update: Made it home

It's a 30 mile drive, but today I didn't get on the freeway, It quit about half way home, after a few moments it started and ran for a few feet. Did that a couple of times then just waited for a stretch, then it started and got me almoat to the top of a hill thet I could have coasted from Sat there for a while and no start. Then a sheriff stopped. After a bit he said he'd push me to the top of the hill (he had pushers). I coasted most of the way home and it started about a block away and was running when I shut it off.

Good news: I got it in my garage.

Bad news: I've got a car that runs fine that I have to fix
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5 speed '91 190E 2.6 320,000 mi. (new car, fast, smooth as silk six, couldn't find any more Peugeots)
5 speed '85 Peugeot 505 2.5l Turbo Diesel 266,000 mi. (old car, fast for a diesel, had 2 others)
5 speed '01 Jetta V6 (new wifes car, pretty quick)
5 speed '85 Peugeot 505 2.2l Turbo Gas 197,000 mi. (wifes car, faster, sadly gone just short of 200k )
5 speed '83 Yamaha 750 Maxim 14,000 mi. (fastest)
0 speed 4' x 8' 1800 lb Harbor Freight utility trailer (only as fast as what's pulling it)
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  #4  
Old 07-26-2007, 09:10 PM
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Join Date: Aug 2001
Location: Houston, Texas
Posts: 393
The intermittency is hard to fix by tests, you have to replace parts and hope for the best, like someone once said, plug and pray.
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Saumil S. Patel
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  #5  
Old 07-27-2007, 10:41 AM
david s poole
 
Join Date: Mar 2005
Location: dallas
Posts: 1,822
your description sounds like the crank sensor at the bell housing[transmits a tdc signal to the ignition module]without this you lose spark.let it cool down for a while and it will start again.
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David S Poole
European Performance
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4696880422

"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
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  #6  
Old 07-27-2007, 02:06 PM
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Join Date: Jun 2000
Location: Saugus, CA USA
Posts: 2,042
Would that be the same signel that runs the tachometer? When the engine quits the tach goes to zero even though the engine is still turning.
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  #7  
Old 07-27-2007, 02:28 PM
the tenor man's Avatar
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Join Date: Nov 2005
Posts: 152
Fuel Pump?

I had a similar problem on a 1989 260E...

What I found after much searching was that the connector under the rear seat to the fuel pumps was corroded...after cleaning them, it never happened again.

Just my 2¢ worth...

The Tenor Man
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  #8  
Old 08-14-2007, 12:27 AM
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Join Date: Jun 2000
Location: Saugus, CA USA
Posts: 2,042
Fixed it!

My first step was a stop at the dealer for an OVP relay, considering what I’ve heard about them here. I also considered the crank sensor but they didn’t have it in stock. The next item was the ignition module, which was unbelievable expensive (stress time.)

I studied up on the crank sensor and figured it was a pick up coil that should be a fairly low resistance when it was good, it measured about 1000 ohms, and open when it wasn’t.

I prepared for next trip into work in case the OVP didn’t fix it and the car could quit at any time. I brought my tools and a meter hoping the catch the problem in the act, and stayed off the freeway. Sure enough it quit, but I got further than I had before, I figure it was cause it was cooler out. I got out my handy meter and measured it and sure enough it was bad, but it was shorted, not open (bad is bad though.) And sure enough a few minutes later the short went away, I tried it and the car ran and got me to work. I figured it would quit on the way home so I stayed in the right lane and always had a place to pull over in sight. I did quit on the way home and I verified the short when bad again and 1000 ohms when it was good. As soon as I got home I ordered a new one.

And a lucky coincidence was my motorcycle started running. I let it sit too long and it didn’t want to run. I’d been soaking the carbs in carb cleaner for a while and they just cleared themselves when my car quit (I park them next to each other, I think they planned this.)

A couple of days later the crank sensor showed up and I replaced it, and the car ran just fine, and has been. Changing it though was its own adventure. It had one screw holding it on, it just didn’t look that bad…wrong. I’ll take a stuck bolt over inaccessible tie wraps next to expensive wiring anyday.
__________________
5 speed '91 190E 2.6 320,000 mi. (new car, fast, smooth as silk six, couldn't find any more Peugeots)
5 speed '85 Peugeot 505 2.5l Turbo Diesel 266,000 mi. (old car, fast for a diesel, had 2 others)
5 speed '01 Jetta V6 (new wifes car, pretty quick)
5 speed '85 Peugeot 505 2.2l Turbo Gas 197,000 mi. (wifes car, faster, sadly gone just short of 200k )
5 speed '83 Yamaha 750 Maxim 14,000 mi. (fastest)
0 speed 4' x 8' 1800 lb Harbor Freight utility trailer (only as fast as what's pulling it)
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  #9  
Old 08-14-2007, 08:14 AM
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Join Date: Aug 2007
Posts: 16
My tachometer does not work on my 190 E 2.3. When I replaced my water pump I took the crank sensor off to clean it. My tach worked when I put the car back together - for a while.

My Question: I my tach not working an indicator that I will be having intermittant trouble with the crank sensor in the future?

Thanks
John Mlynick
Shelburne Falls, MA

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