Reverse Problems - Help - Maserati Forum

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post #1 of 16 Old 04-30-2014, 09:16 PM Thread Starter
 
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Reverse Problems - Help

I previously had posted about the transmission not engaging.

Well, I have been able to obtain all forward gears, although at times it goes to 2nd than back down to 1st when I just start out. Also in 1st it seems to rev high till it fully engages. I can get reverse to engage but the engine stalls. Up on the lift there is no problem at all, goes in reverse fine.

Checked all fuses, brake switch, and F1 fluid all good. I did add fluid, about 20oz.

Any input is greatly appreciated. Thank you.

Harlo
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post #2 of 16 Old 04-30-2014, 09:21 PM
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Not sure how much credibility I have, but I'm beginning to suspect your clutch, or at least one of the sensors is shot. Jumping out of first and issues with reverse are classic symptoms.

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post #3 of 16 Old 04-30-2014, 10:56 PM
 
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Yep
Possibly collapsed fingers
Reverse Problems - Help-imageuploadedbytapatalk1398898592.308737.jpg
See pic

gs mcv#128
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post #4 of 16 Old 05-01-2014, 12:34 AM Thread Starter
 
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What baffles me that the car functioned fine when I parked it for the winter. I could see a sensor may go but what would cause the fingers to collapse?

From the picture, I see the spacing between the fingers are not uniform, is that what is meant by a collapse? Would the clutch need replaced or can it be repaired? And if it may be a sensor, what is the particular sensor that is mucking this up?

Thanks guys,
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post #5 of 16 Old 05-01-2014, 03:13 AM
 
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Reverse Problems - Help

If whats in the pic is what u have, new clutch- not repairable

Yep spaces = collapse

gs mcv#128
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post #6 of 16 Old 05-01-2014, 06:38 AM
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Yep that spring finger at about the 2 o'clock position should have sprung back, but has not.

Beats me why storing it over the winter would do that. In fact I don't think it would so it's either coincidence or something else.

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post #7 of 16 Old 05-01-2014, 10:51 AM Thread Starter
 
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I haven't looked at the clutch yet but I would like to try the sensor option first ( cheaper of coarse). Which sensor may be the culprit? And how can I tell if it is indeed the culprit?
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Ok. New insight.

The speedo reads 18mph at rest! I had not noticed this before but the tech picked up on it. The car goes into reverse every time if it is on a hill and can drift backwards 6-12". On the same hill if it is put into first the clutch is slipping a bunch and struggles to move forward. Thinking that if the car thinks it is doing 18 mph it would not let it go into reverse and also way it goes to 2nd to start off before returning to 1st.

Is there a particular sensor that controls what the speedo reads?

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post #9 of 16 Old 05-01-2014, 10:57 PM
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Quote:
Originally Posted by Harlo View Post
Ok. New insight.

The speedo reads 18mph at rest! I had not noticed this before but the tech picked up on it. The car goes into reverse every time if it is on a hill and can drift backwards 6-12". On the same hill if it is put into first the clutch is slipping a bunch and struggles to move forward. Thinking that if the car thinks it is doing 18 mph it would not let it go into reverse and also way it goes to 2nd to start off before returning to 1st.

Is there a particular sensor that controls what the speedo reads?

Harlo
Are you saying the speedo moves off the peg when you turn power on?

The car should not stall ever. It really sounds like you have a clutch problem or possibly a clutch position sensor. Do any lights come on when it's acting up or when the engine stalls?

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post #10 of 16 Old 05-01-2014, 11:54 PM Thread Starter
 
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Yes, the speedo reads 18mph while the car is at rest idling.

No lights.

Would the clutch postion sensor cause this behavior? Do you know where the sensor is located? I'm having a hard time believing it's the clutch because the car drove fine when parked it for the winter.

Thanks for the help.
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post #11 of 16 Old 05-02-2014, 12:17 AM
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Originally Posted by Harlo View Post
Yes, the speedo reads 18mph while the car is at rest idling.

No lights.

Would the clutch postion sensor cause this behavior? Do you know where the sensor is located? I'm having a hard time believing it's the clutch because the car drove fine when parked it for the winter.

Thanks for the help.
Harlo
That isn't what I asked. There is a peg that keeps the speedo from going to zero. Same for the tach. The CPS is in the clutch assembly. You have to take it apart to replace. If you are close to a dealer or indy with the right equipment, they should be able to tell you if a sensor is uunreasonable or if you have a software problems or a mechanical problem.

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post #12 of 16 Old 05-02-2014, 01:12 AM Thread Starter
 
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Sorry, I'm going off of the feedback I'm getting back from the tech and he has the car so I'll check that out tomorrow.
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post #13 of 16 Old 05-02-2014, 01:31 AM
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Sorry, I'm going off of the feedback I'm getting back from the tech and he has the car so I'll check that out tomorrow.
Cool. Let us know what you find out.

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post #14 of 16 Old 05-02-2014, 02:19 PM Thread Starter
 
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Now I understand what you talking about and no it does not come off the needle ( never notice the peg was at the 18mph mark before). The tech is off today so I wont be able to tell him the disappointing news till Monday. We thought this would lead to a diagnosis.

So, I'm still looking at the CPS or clutch its self as the problem. Is there anything else I can point the tech to as a possible culprit while he has the car to check out?

Thanks,
Harlo
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post #15 of 16 Old 05-02-2014, 03:12 PM
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Quote:
Originally Posted by Harlo View Post
Ok. New insight.

The speedo reads 18mph at rest! I had not noticed this before but the tech picked up on it. The car goes into reverse every time if it is on a hill and can drift backwards 6-12". On the same hill if it is put into first the clutch is slipping a bunch and struggles to move forward. Thinking that if the car thinks it is doing 18 mph it would not let it go into reverse and also way it goes to 2nd to start off before returning to 1st.

Is there a particular sensor that controls what the speedo reads?

Harlo
I'm now really leaning to clutch issues or CPS. Maybe more CPS as you feel given it was fine before the winter

C

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