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Car Problems? Classic 900 Only If you're experiencing problems with your Classic 900, post your question in here.

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Old 03-15-2009, 08:35 AM   #21
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Just went thru replacing a C900 fuel pump this week and a 9000 fuel pump a couple of months ago. When the smog police aren't looking get a can of carb cleaner or similar type spray fluid and spray a liberal amount into the throttle body, typically on the C900 there is a vacuum line that goes into the TB that you can use.

Try and crank it over, it will help indicate if it is fuel or spark. The 88 Ignition Amp is on the driver side of the car and fairly visible. Couple of screws/torx and it should come out. There is a voltage/ohm test to see what shape its in, but if the tach bounces, usually its good.

If it is a fuel pump, its reasonably simple if you don't snap the barb on the underside of the housing that holds the high pressure side.
Hey Oliver,

Thanks for the feedback. Unfortunately, I'm not getting any voltage on pin #18 on the ECU connector. Fuse #22 is good so I'm trying to figure out why there in no voltage on the pin...

Jitters
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Old 03-15-2009, 06:43 PM   #22
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Originally Posted by oliversexpedition View Post
Just went thru replacing a C900 fuel pump this week and a 9000 fuel pump a couple of months ago. When the smog police aren't looking get a can of carb cleaner or similar type spray fluid and spray a liberal amount into the throttle body, typically on the C900 there is a vacuum line that goes into the TB that you can use.

Try and crank it over, it will help indicate if it is fuel or spark. The 88 Ignition Amp is on the driver side of the car and fairly visible. Couple of screws/torx and it should come out. There is a voltage/ohm test to see what shape its in, but if the tach bounces, usually its good.

If it is a fuel pump, its reasonably simple if you don't snap the barb on the underside of the housing that holds the high pressure side.
Hey Oliver,

Thanks for the feedback. I think I might be close to finding the problem. I took the ECU out and tested it in a known good 900 and it didn't work. So, I believe it's the ECU that is the culprit. Will no for sure tomorrow when I locate and install the new one...

Cheers,

Jitters
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Old 03-15-2009, 10:02 PM   #23
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check the basics then report back,, check fuel, spark and compression, then work from there

check for fuel buy loosening the fuel rail feed line, and cranking the car, watch for fuel spitting out,, it should come out quite briskly.

check for spark any way possible, i usally pull a plug out and ground it to a head, this checks the entire system.

to me this sounds igniton related, even if you get spark, you could have a bad PCM, or hall effect sensor inside the dizzy (turbo models only) either of these can throw spark far enough off time where the car will not run, but will still give spark when tested.
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Old 03-15-2009, 10:44 PM   #24
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same thing happened to my wifes sedan, sensor in distributor went to pieces but would still send spark thru but at wrong time
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Old 03-16-2009, 07:27 PM   #25
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Thanks guys for the feedback; however, as I stated earlier, I pulled the ECM and tested it in another 900 turbo and it didn't work. So, I'm leaning more at this point to the ECM being the problem. But will surely find out just as soon as I can locate one...

Cheers,

Jitters
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Old 03-16-2009, 07:28 PM   #26
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Originally Posted by mike d View Post
check the basics then report back,, check fuel, spark and compression, then work from there

check for fuel buy loosening the fuel rail feed line, and cranking the car, watch for fuel spitting out,, it should come out quite briskly.

check for spark any way possible, i usally pull a plug out and ground it to a head, this checks the entire system.

to me this sounds igniton related, even if you get spark, you could have a bad PCM, or hall effect sensor inside the dizzy (turbo models only) either of these can throw spark far enough off time where the car will not run, but will still give spark when tested.
How do you verify/check the hall effect sensor?

Thx,

Jitters
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Old 03-17-2009, 09:16 PM   #27
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Problem Solved

Well dudes an dudettes, problem solved. Replaced the ECU and I'm on the road again...

Thanks for all the tips, feeback, pointers, etc...

Cheers,

Jitters
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