To Do List for Bumblebee that needs to be bulletproof, What would you do? |
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To Do List for Bumblebee that needs to be bulletproof, What would you do? |
jhynesrockmtn |
Oct 30 2022, 10:20 AM
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#1
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Member Group: Members Posts: 425 Joined: 13-June 16 From: spokane wa Member No.: 20,100 Region Association: Pacific Northwest |
So I bought this Bumblebee on BAT that was extensively restored around 2000 and has seen little use since. My plan is to drive it, including to Rennsport in 2023 and other 914 events in the future like Octeenerfest.
So the car runs and drives and is in overall excellent condition. It does "hunt" at idle and has a slight miss under acceleration. However, 20+ years of sitting and having original plastic fuel lines has me planning a winter "refresh" geared toward proactively making the car as reliable as possible. Still running the Djet FI which I want to keep. Please add to my list to help with projects I will do over the winter. I will drop the engine as part of this process. Here is what I have so far: SS fuel line kit from Tangerine Racing New rubber fuel lines New vacuum lines New fuel filter Take fuel injectors to Mr. Injector for testing - he is local to me Inspect fuel tank, replace tank screen Replace TPS board New spark plugs and ignition wires Install 123ignition distributor Valve adjustment New fan belt Oil and trans fluid change Send fuel injection harness to Jeff Bowlsby for inspection Brakes seem good, will flush and replace soft brake lines Seat belts re webbed Inspect shifter bushings, replace as necessary Install turbo tie rod kit Install engine firewall pad - was left out of restoration Clock is inop, send to get converted to quartz Replace clutch and throttle cables, keep current for spares Inspect clutch components with engine/trans out Inspect wheel bearings - repack/replace as necessary New tires, set ride height (front is a bit proud to my eye) and align Inspect all suspension bushings Replace side graphic with new from 914Rubber What am I missing? |
DRPHIL914 |
Nov 30 2023, 01:17 PM
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#2
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Dr. Phil Group: Members Posts: 5,808 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States |
I haven’t read through the whole thread but since you mentioned bulletproof and ready to drive a lot of miles, I was thinking a serious look at the internals might be warranted. Some of the rebuilt engines and trans, even from other shops, have been so pitiful that I don’t trust anything unless we open it up and put eyes on the parts. You mentioned the the engine tends to "hunt" at idle. That is a pretty sure sign that the AAR (Auxiliary Air Regulator) has gotten gummed up or its heating coil burned out. Take the AAR apart and clean it/repair the heating coil, or just buy a rebuilt one from Auto Atlanta. Since you are replacing all the gaskets and seals while the engine is out, this will insure that you have addressed all potential vacuum leaks that will cause an uneven idle. Yes, AAR, or other source of a air leak/vac leak and/or you are running a bit lean which can be a cause of hunting as well. |
jhynesrockmtn |
Nov 30 2023, 04:45 PM
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#3
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Member Group: Members Posts: 425 Joined: 13-June 16 From: spokane wa Member No.: 20,100 Region Association: Pacific Northwest |
I haven’t read through the whole thread but since you mentioned bulletproof and ready to drive a lot of miles, I was thinking a serious look at the internals might be warranted. Some of the rebuilt engines and trans, even from other shops, have been so pitiful that I don’t trust anything unless we open it up and put eyes on the parts. You mentioned the the engine tends to "hunt" at idle. That is a pretty sure sign that the AAR (Auxiliary Air Regulator) has gotten gummed up or its heating coil burned out. Take the AAR apart and clean it/repair the heating coil, or just buy a rebuilt one from Auto Atlanta. Since you are replacing all the gaskets and seals while the engine is out, this will insure that you have addressed all potential vacuum leaks that will cause an uneven idle. Yes, AAR, or other source of a air leak/vac leak and/or you are running a bit lean which can be a cause of hunting as well. The engine has been out and is back in. All fuel and vacuum lines replaced. The hunt and hesitation, or miss under acceleration is gone. What I did notice is the idle is consistently high. I've read that can be an issue with the 123ignition distributors. I'll look at that and smoke test the engine over the winter to see if I might have a vacuum leak. |
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