Air throttle help needed ASAP

paulrobie · April 01, 2012, 09:12:15 AM

This is for rdbishop here at the rally: he installed a new Air throttle on his 68 8v92 and it is not operating properly, not holding pressure.... Can anybody offer some help?

Sent from my iPad using Tapatalk HD

luvrbus · April 01, 2012, 09:19:43 AM

Diaphragm is probably bad I only bought one from the E place it was a good lesson for me lol but he need to check the travel if it extends to far it will not hold the pod has 2 rings on the shaft it cannot extend farther than the second ring ,this may be worthless info not knowing what cylinder Richard has or bought the pedal and the pod need to match

paulrobie · April 01, 2012, 09:26:10 AM

Quote from: luvrbus on April 01, 2012, 09:19:43 AM
Diaphragm is probably bad I only bought one from the E place it was a good lesson for me lol but he need to check the travel if it extends to far it will not hold the pod has 2 rings on the shaft it cannot extend farther than the second ring ,this may be worthless info not knowing what cylinder Richard has or bought the pedal and the pod need to match

Luvrbus, can you call 830 481 3657 cell phone

buswarrior · April 01, 2012, 09:26:34 AM

Other than wondering about a '68 8V92, I have nothing further to offer in troubleshooting.

Did this get changed at the rally? Are the old parts available to re-rig to get him home?

happy coaching!
buswarrior

paulrobie · April 01, 2012, 09:29:23 AM

Quote from: buswarrior on April 01, 2012, 09:26:34 AM
Other than wondering about a '68 8V92, I have nothing further to offer in troubleshooting.

Did this get changed at the rally? Are the old parts available to re-rig to get him home?

happy coaching!
buswarrior

No on returning to original as was changed at rally due to failure.

buswarrior · April 01, 2012, 09:35:18 AM

Is the problem up the front at the pedal?

happy coaching!
buswarrior

paulrobie · April 01, 2012, 09:36:59 AM

Quote from: buswarrior on April 01, 2012, 09:35:18 AM
Is the problem up the front at the pedal?

happy coaching!
buswarrior

Not sure... The system is either full open or full closed

buswarrior · April 01, 2012, 09:38:59 AM

Yup, I'd be blaming the foot pedal if it won't modulate.

happy coaching!
buswarrior

Cary and Don · April 01, 2012, 09:48:18 AM

We had this problem on one. It turned out that the spring in the rear didn't match the front valve. It was all or nothing. We ordered the right spring from Williams to match and it worked great.

Don and Cary
1973 05 Eagle
GM 4107
Neoplan AN340

paulrobie · April 01, 2012, 10:07:22 AM

Thank you for the input, Richard believes he can get it home.

Busted Knuckle · April 01, 2012, 12:52:10 PM

Quote from: paulrobie on April 01, 2012, 10:07:22 AM
Thank you for the input, Richard believes he can get it home.

Wow that could be an interesting ride wide opened or all closed all the way home! LOL!
By the way what rally?

BK

opus · April 01, 2012, 01:29:10 PM

Sounds like a spring on the engine end broke.

txjeff · April 01, 2012, 02:36:39 PM

BK
Thats the way Richards wife described the trip to the rally....intresting

Thanks to Don & Cary we added some tension to the spring (bungee cord) and it seemed to help slow the response down. Im sure Richard will respond with detail of the return trip.

jeff

rdbishop · April 01, 2012, 05:16:31 PM

Thanks Guys, Made it home with the bungee cord working farely well, 65 top end and no power uphill, but we made it. I'll order a spring for the rear tomorrow and see how that does. Thanks to All and especially the guys at the rally persisting to get me home smoothly. Will update when we get the part and installed.

Richard

Cary and Don · April 01, 2012, 07:11:42 PM

You need to make sure you have the number on the throttle valve. Then they can make sure they give you the matching air pressure spring. They might try to sell you the whole part for the rear, but the spring is really easy to change and I think it was like $20 with shipping.

Don and Cary
1973 05 Eagle
GM 4107
Neoplan AN340