- Thread starter
- #361
Assembled the throttle body and started the engine. Very slight improvement to maybe 15 in of vacuum. Did the smoke check again. Could not see any leaks.
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Builds My 40 build (2 Viewers)
- Thread starter Rusty 72
- Start date
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- Thread starter
- #362
Had it for several years and I have no idea.
How does it run?
- Thread starter
- #364
Well...........
After diagnosing the engine, everything is pointing to late valve timing. It appears either the camshaft was ground wrong or the Toyota cam gear was assembled wrong.
The choices are,
1) drive it the way it is. Not good.
2) change to a carburetor and conventional distributor
3) change the camshaft and cam gear.
4) sell the engine.
5) part it out. Not really an option. I am not interested in messing with the problems with shipping.
6) ???
After diagnosing the engine, everything is pointing to late valve timing. It appears either the camshaft was ground wrong or the Toyota cam gear was assembled wrong.
The choices are,
1) drive it the way it is. Not good.
2) change to a carburetor and conventional distributor
3) change the camshaft and cam gear.
4) sell the engine.
5) part it out. Not really an option. I am not interested in messing with the problems with shipping.
6) ???
- Thread starter
- #365
I vote CityRacer Carb and be done with it.
- Thread starter
- #367
Dont know if I am going to spend any more money on it......
Did you try plugging off the booster hose?
- Thread starter
- #369
Yes it was plugged. Only vacuum line attached was to the map sensor.
If the crank is at tdc, what are the #1 valves doing?
- Thread starter
- #371
#1 compression stroke valves are loose. Set at .016 hot
Was the PCV hooked up for the vacuum test?
- Thread starter
- #374
First time yes then I plugged it. Virtually no change.
- Thread starter
- #375
Carb is less dependent on vacuum than GM's tbi fuel injection.
Is it possible it needs to be broken in for the rings to fully seat? At 15 the ecu may be confused at idle since the map is sending less vacuum than expected. Thats my thoughts anyway. My brain is kinda fried from working all day and a bad night sleep though.
- Thread starter
- #377
It needs at least 17 in at idle for the computer to function correctly. Years ago I was talking to an engineer from TRW about an oil consumption problem I was having with a 390 Ford. He said the rings will be seated in within the first 5 minutes.
I vote #3 from above post. Pull the cam, verify it is what it's supposed to be. Replace if necessary.
You are so close. It runs. No giving up now.
I just read the entire thread. It is full of great tech I will be using. You're just not meant to retire quite yet.
You are so close. It runs. No giving up now.
I just read the entire thread. It is full of great tech I will be using. You're just not meant to retire quite yet.
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- Thread starter
- #379
If I was to work on it today I would be removing the engine and installing something different. The easiest is a 2F. After the main bearing problem I seriously thought about a SBC. Just too much changing is required.
- Thread starter
- #380
Tossed the fiberglass top on today. Need to pickup a box of large flange pop rivets to secure the top to the rain gutter.
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