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07-27-2016, 05:34 PM
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#1
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Rivet Master
1991 25' Airstream 250
Oxford
, Oxfordshire
Join Date: Jun 2007
Posts: 1,253
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Tbi
If you have a query, PM me and I might be able to help.
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07-27-2016, 06:25 PM
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#2
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Rivet Master
2006 23' Safari SE
Biloxi
, Mississippi
Join Date: Nov 2011
Posts: 8,278
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I love a good mystery.
__________________
MICHAEL
Do you know what a learning experience is? A learning experience is one of those things that says "You know that thing that you just did? Don't do that."
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07-27-2016, 06:27 PM
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#3
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Rivet Master
2014 25' Flying Cloud
Cuddebackville
, New York
Join Date: May 2007
Posts: 4,333
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Why is the sky blue?
__________________
2014 25' Flying Cloud Rear Twin
2019 Ford Expedition Platinum
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07-27-2016, 06:47 PM
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#4
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Rivet Master
2012 27' Flying Cloud
W
, New England
Join Date: Oct 2012
Posts: 7,402
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Tbi
Mystery solved? Perhaps a reply meant for this thread?
http://www.airforums.com/forums/f311...ml#post1771248
Not sure how your wires got crossed there - but as a separate thread - you had us all guessing on what you were going for there, Boom Sounds! 😀
Hope this helps close the loop!
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07-27-2016, 07:01 PM
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#5
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Keen amature
1975 20' Argosy 20
Chestfield
, Kent
Join Date: Mar 2014
Posts: 3,533
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Quote:
Originally Posted by SteveSueMac
Mystery solved? Perhaps a reply meant for this thread?
http://www.airforums.com/forums/f311...ml#post1771248
Not sure how your wires got crossed there - but as a separate thread - you had us all guessing on what you were going for there, Boom Sounds! 😀
Hope this helps close the loop!
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Close! Maybe a smaller explanation; Brad and I have been trying to help Nick in preparation for his summer vacation to Italy in his 250.....
Without adding details, there is nothing like a component failure when you are in a time crunch, to focus the mind and Nick has learnt more about 454 TBI in the last few days than he really wanted ever to know, hence the initial message offering help to anyone in the same boat.
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07-27-2016, 07:04 PM
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#6
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Keen amature
1975 20' Argosy 20
Chestfield
, Kent
Join Date: Mar 2014
Posts: 3,533
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I should have added....in this case 'help' means, Brad providing experience and knowledge and me running around autoparts stores whilst driving to the airport to fly to UK - I officially know 'nothing' about TBI but was a willing 'go-for'!
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07-27-2016, 07:13 PM
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#7
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Rivet Master
2012 27' Flying Cloud
W
, New England
Join Date: Oct 2012
Posts: 7,402
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Tbi
As long as it all works out. 😀
I had to edit my reply as first time through it said something about having your wives crossed (instead of wires) 😳
And on edit here - I don't even know how to spell TBI 😀
Hope all's well with you, Martin!
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07-28-2016, 12:18 AM
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#8
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Rivet Master
1991 25' Airstream 250
Oxford
, Oxfordshire
Join Date: Jun 2007
Posts: 1,253
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Maximum respect to Martin and Brad Kahler. I shall purchase some beer when our paths finally cross.
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07-28-2016, 12:34 AM
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#9
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Rivet Master
1991 25' Airstream 250
Oxford
, Oxfordshire
Join Date: Jun 2007
Posts: 1,253
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Step 1 find your casting number
Step 2 cross reference ac Delco and Rockauto sites with your vin number and look under fuel injection
Step 3 identify the bewildering number of AC Delco throttle bodies which appear to fit your van at wildly different prices
Step 4 call Ac Delco and any number of Chevy parts houses, none of whom can give you a straight answer. Realise that none of them are made anymore so you are looking for dead stock
Step 5 ponder the imperceptible differences between the throttle bodies and how they tie back to engine codes, your trans and your RPO numbers
Step 6 write to Brad Kahler and wait for response
Step 7 have a cold beer and take your pick, maybe they all work and the fact they vary between $200 and $1000 bucks isn't actually relevant
Step 8 laugh at the fact that AC Delco told you their online system with VIN lookup isn't always correct and they use another system which ties into the GM parts database. That shattered my previous understanding
Step 9 realise you have nine days until your vacation and the part is on the other side of the world
Step 10 just make your mind up and order it. There, I said it.
Step 11 remind anyone considering a throttle body rebuild not to shear the head off the throttle body
Seriously, know your VIN, get your RPO print out, there's nothing quite like a stock casting number, cross reference sites. TBI should be straightforward, but the throttle bodies and vary. You must have the flange connector iac on the 454. Ninja fuel systems do a great rebuild gasket set. Cody the car guy and fuel injection sucks have some good YouTube videos on the rebuild process.
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07-28-2016, 05:45 PM
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#10
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Rivet Master
1991 25' Airstream 250
Oxford
, Oxfordshire
Join Date: Jun 2007
Posts: 1,253
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We're zooming in on the facts.....
'Nick, we don't have that particular part number of throttle body on hand. We do have several 454 throttle bodies that would fit a '91 truck, but some of the van and motorhome throttle bodies have different throttle linkage so the cable can mount from the front, so I'm not sure if any of them would work for you.'
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07-29-2016, 03:13 PM
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#11
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Rivet Master
1991 25' Airstream 250
Oxford
, Oxfordshire
Join Date: Jun 2007
Posts: 1,253
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Managed to get the throttle body down to a local machine shop - they fixed it good as new.
Btw - if you need a new throttle body, check out
SPR PERFORMANCE
1111 W Morton Ave Ste 2
Jacksonville, IL 62650
Or
Greg Spence
Carburetor Specialist
5715 N Commerce Ct., Suite 200
Alpharetta, GA 30004-4178
They are good people
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07-29-2016, 03:26 PM
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#12
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Keen amature
1975 20' Argosy 20
Chestfield
, Kent
Join Date: Mar 2014
Posts: 3,533
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Quote:
Originally Posted by Boom Sounds
Managed to get the throttle body down to a local machine shop - they fixed it good as new.
Btw - if you need a new throttle body, check out
SPR PERFORMANCE
1111 W Morton Ave Ste 2
Jacksonville, IL 62650
Or
Greg Spence
Carburetor Specialist
5715 N Commerce Ct., Suite 200
Alpharetta, GA 30004-4178
They are good people
Sent from my iPhone using Airstream Forums
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Great news Nick....what is the current betting on making the holiday trip next week? If you are coming through Dover you will be pretty close to our place in the UK!
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07-29-2016, 03:38 PM
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#13
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Rivet Master
1974 20' Argosy 20
Richmond
, Kentucky
Join Date: Jan 2003
Posts: 9,115
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Nick, glad to hear a machine shop was able to remove the broken screw! I'd love to know what technique they used to perform the extraction.
Hopefully this means you'll be able to make your Italy trip happen.
Brad
__________________
Air forums # 1674
1974 20' Argosy Motor Home
1975 24' Argosy Motor Home
1974 31' Excella trailer (parting out, as of 4/1/2015 I have wheels & windows left to sell)
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07-31-2016, 11:57 PM
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#14
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Rivet Master
1991 25' Airstream 250
Oxford
, Oxfordshire
Join Date: Jun 2007
Posts: 1,253
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Have dropped you both an email, have made good progress, but the underlying problem remains. I have a few things still to try out (timing, grounds, vacuum hoses and EGR valve), but the clock is ticking.
Theoretically, we leave at the weekend. If that happens, it will probably be Sunday. Martin - are you about? We'll be getting the tunnel so heading M25/Folkestone.
Wish me luck!
PS. Turns out that the 454/7.4 L TBI Motorhome throttle bodies were slightly different insomuch as vacuum port and linkages were slightly different layouts. I think some of the others can be made to work though.
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08-01-2016, 10:34 AM
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#15
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Rivet Master
1974 20' Argosy 20
Richmond
, Kentucky
Join Date: Jan 2003
Posts: 9,115
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Quote:
Originally Posted by Boom Sounds
PS. Turns out that the 454/7.4 L TBI Motorhome throttle bodies were slightly different insomuch as vacuum port and linkages were slightly different layouts. I think some of the others can be made to work though.
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Some throttle bodies have vacuum ports for each head plus the large one for the PCV hose. My throttle body only has one head vacuum port which I have plugged.
I think the throttle linkages are interchangeable but I could be wrong.
I hope your trip goes well
__________________
Air forums # 1674
1974 20' Argosy Motor Home
1975 24' Argosy Motor Home
1974 31' Excella trailer (parting out, as of 4/1/2015 I have wheels & windows left to sell)
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