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1992 940 turbo wont start -Air intake hose problem?

My 1992 940 turbo wont start after some minor maintenance. While working on my 940 I noticed the bottom of my air supply hose was kind of thin and creased along the bottom. I could not see if there was a hole in it or not. This is the hose that goes from the air cleaner box, through the AMM and connects to the what I believe is the wastegate. I didnt have a hose to replace it so I taped it up the best I could. After finishing this, my car will not start. I've tried cleaning and reconnecting the electrical connection that plugs into the AMM and the other one near it but this hasn't helped.

Any ideas what could have gone wrong here?

Thanks, Tom

Reply to
TomR
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The wastegate is on the exhaust pipe side of the turbo, the hose you're describing sounds like the one that goes to the intercooler which is a large radiator looking thing. Are you sure you hooked all the hoses back up where they went?

Reply to
James Sweet

The hose you're speaking of is the intake hose to the turbo. Its common for it to turn to mush at the spot around where the smaller hose from the oil separator connects to it. Taping it up should not affect starting so its got to be something else. Does it crank? Are you sure its back on correct and securely? If you didn't put it back on right and have a big vacuum leak it could prevent it from starting.

Dave

Reply to
tom.dave

It is the intake hose to the turbo. After closer inspection I found a tear in the hose where the other line (oil seperator?) goes in. I taped everything up and made sure it's all connected properly. I never took it off. I did take the vacuum line that goes from the turbo to the intake manifold off and try to replace it. I couldnt find another so I put it back on. It's worn but seems to be ok otherwise. The engine does crank and runs very rough or not at all.

Thanks for the input. Any other ideas?

Reply to
TomR

Hmm... it would help to know if the problem is spark or fuel. Can you spray a blast of starting fluid in the air cleaner and see if the engine goes "vroom?"

Mike

Reply to
Michael Pardee

Mike - That sounds like a good idea. Especially since I don't know what else to do! The air intake system looks pretty tight. Do you think I should remove the top of the air cleaner and just fire away with the starting fluid or is there a better place to spray it. Perhaps disconnect the air inlet from the AMM maybe? I'll let you know if it works after I get some starting fluid. Thanks for the input. Tom

Reply to
TomR

I usually lift the top of the air cleaner and spray a few second's worth onto the filter, then close it back up.

Mike

Reply to
Michael Pardee

Tried the starter fluid but it was no help. Disconnected the AMM connection and engine still would not start. Checked and I do have a spark and the plugs are wet.

Took the throttle body intake hose off and engine started but ran lousy. Not sure if this was such a good idea but while the engine was running I disconnected the AMM connector and the engine died instantly.

Any idea how to diagnose the AMM to see if it is good or not? Could the idle control valve, a vacuum leak or the o2 sensor cause this? Thanks for the help.

Reply to
TomR

Not sure what I did but it's running now. Poked, prodded, and checked a lot of different things and the car runs fine now. Cleaning the AMM may have helped the most. When I took it off and looked inside, something fell out. It looked like a small piece of wire so I thought the element had broken and that was the cause of the engine not starting. Turns out it was a very small twig. It got inside the AMM somehow and perhaps was resting on the wire element inside. ........I don't know but the engine runs fine now.

Reply to
TomR

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