New BB Crate engine not wired correctly?? - Team Camaro Tech
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post #1 of 13 (permalink) Old Jul 20th, 08, 06:31 PM Thread Starter
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Ken
 
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New BB Crate engine not wired correctly??

A little background: I've installed a ZZ502 in my '67. When I started the project I had nothing but a shell so all wiring would also be new. I installed the 502 and all the necessary engine and dash harnesses. I installed the battery in the trunk. The engine was prepped including removal of distributor for oil priming and all other fluid levels brought to the appropriate levels. Distributor was re-installed using some guidelines on this web site.
It did take some time wiring the HEI distributor, electric fuel pump, solonoid, ignition key, appropriate grounds. I used a ampmeter to locate live wires in the engine harness to help me in this task. I used aligator clips for trial and error to fire the engine.
After several trials I finally got the engine running and did my base timing by hand. With the exception of one noisy lifter the engine ran great even though my timing was by hand/ear and without a light.(However very rich with some unburned fuel fumes) This was also achieved without the use of the electric choke. The other day I decided to set the timing at the required 10 degrees BTDC.(w/o vacumme line attached) The distributor was almost there and little adjustment was needed. After this I decided to
hard wire the new gages including tach, oil pressure, water temp and hook up the electric choke.
NOW THE PROBLEM: After starting the engine I quickly realized that something has changed and it now runs terrible. Can't give it any throttle without stalling, barely idles, backfires, etc. What might be wrong? Electric choke wired wrong? Should I have wired it first before timing? Maybe I don't have a solid 12V to the electric choke?? Thanks for any ideas! KP
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post #2 of 13 (permalink) Old Jul 21st, 08, 01:24 AM
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Re: New BB Crate engine not wired correctly??

Ken,
I didnt stay at a Holiday Inn last night so I'm winging this guess....It sounds like timing is off. You can disconnect the choke, but thats not causing your issues.
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post #3 of 13 (permalink) Old Jul 21st, 08, 04:53 AM
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Re: New BB Crate engine not wired correctly??

Check firing order as first thing to look at if the choke is open.

Tim Smith
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post #4 of 13 (permalink) Old Jul 21st, 08, 05:02 PM Thread Starter
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Ken
 
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Re: New BB Crate engine not wired correctly??

Update: disconnected electric choke(like it was when it ran), checked dist. cap and checked all wires to see if correct firing order is intact - it is. Disconnected all hard wires to gages(like it was when it ran), checked electric fuel pump, am running 6psi at regulator and then duel lines to 850 holley(just like it was when it ran). Tried to start and the result is that it tries to fire after cranking 8-10 times but no dice. Tried a little gas dripped in the carb. just for grinns to see if maybe a fuel problem but no change. It totally seems like a timing or distributor problem but what could have changed?? Pulled dist cap to see if anything obvious but no. Tried to readjust timing by hand to try to get it to fire but still no. Checked voltage to the leads to the starter, ignition and they read 12.4 volts. Maybe I should pull the dist. and reinsert. But if it was running before didn't I have it dist. teeth aligned correctly? Any ideas?

Thanks, Ken
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post #5 of 13 (permalink) Old Jul 21st, 08, 07:44 PM
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Re: New BB Crate engine not wired correctly??

I would put my remote start switch on it
Connect my timing light
Crank it while looking at the timing.

Don't be afraid to twist heck out of the distributor if your timing light flashes. CCW advances timing. If your light doesn't flash either the light is bad or you're not getting fire. I've been known to walk over to another engine to verify my light works. Yes, they will flash at cranking speed.

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post #6 of 13 (permalink) Old Jul 22nd, 08, 03:10 AM Thread Starter
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Re: New BB Crate engine not wired correctly??

I'll try. Thanks KP
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post #7 of 13 (permalink) Old Jul 22nd, 08, 05:55 PM Thread Starter
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Re: New BB Crate engine not wired correctly??

Update: Checked timing with engine cranking and it was right on. Now I'm convinced for several reasons that the problem is if fact the fuel system. I think that the engine is way over fueled. Engine was still trying to start. Pulled 3 plugs and all were fouled bad. I'm in the wrong forum for help with this problem. Thanks a lot for your idea with checking the timing while cranking because thats what led me to this fuel conclusion. Please feel free to add more input re: the carb you have and knowledge of that.
Thanks again. KP
KP
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post #8 of 13 (permalink) Old Jul 22nd, 08, 06:26 PM
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Re: New BB Crate engine not wired correctly??

Naw you're not in the wrong forum. And you are most welcome.

If you have an electric fuel pump turn the damthing off, then try. Also since it is flooded, hold your foot to the floor while cranking. This lets it get air easier to dry out. Beware don't put your pointy head over the carb while trying this. Flooded engines have pisspoor table manners and IT WILL detect you over the carb and puke fire on you. Always try to put the air cleaner on any time possible when dealing with a pissed off engine, as it helps contain fire. Have a fire xt handy and a bigass coat or blanket or something you can heave on a fire to minimize damage.

I think you are either 180 out on the distributor or have just flooded it with all the attempts. If it's 180 out it will have exceptionally bad manners but if you flood it bad enough it can camouflage some of it. Beware damn good fires start this way.

If those plugs are really wet you may be better off pulling all of them, de-power ignition and crank it some to dry the holes. With carb wide open for easy air flow.

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post #9 of 13 (permalink) Old Jul 22nd, 08, 06:42 PM
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Re: New BB Crate engine not wired correctly??

See that you have elec FP, that's good. Do you have a regulator? And have you checked the fuel level in the bowls? What carb?

See that you are back east, please don't take the 'pointy head' wrong it was meant in fun. My part of the country we say 'pointy head' all the time. I've run into a few deals where regional speech differences can cause grief, hope this ain't one of em.

Also check for unplugged vac hoses or other sources of a vac leak. A big vac leak can make an engine not start worth a hoot. Look at PCV first.

Tim Smith
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post #10 of 13 (permalink) Old Jul 22nd, 08, 08:47 PM
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Re: New BB Crate engine not wired correctly??

Quote:
Originally Posted by 77wolf10.85 View Post
Naw you're not in the wrong forum. And you are most welcome.

If you have an electric fuel pump turn the damthing off, then try. Also since it is flooded, hold your foot to the floor while cranking. This lets it get air easier to dry out. Beware don't put your pointy head over the carb while trying this. Flooded engines have pisspoor table manners and IT WILL detect you over the carb and puke fire on you. Always try to put the air cleaner on any time possible when dealing with a pissed off engine, as it helps contain fire. Have a fire xt handy and a bigass coat or blanket or something you can heave on a fire to minimize damage.

I think you are either 180 out on the distributor or have just flooded it with all the attempts. If it's 180 out it will have exceptionally bad manners but if you flood it bad enough it can camouflage some of it. Beware damn good fires start this way.

If those plugs are really wet you may be better off pulling all of them, de-power ignition and crank it some to dry the holes. With carb wide open for easy air flow.

true dat.

The only Mustang I'd ever own is a Fender.

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'14 5.0 Mustang
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post #11 of 13 (permalink) Old Jul 23rd, 08, 03:11 AM Thread Starter
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Re: New BB Crate engine not wired correctly??

Thanks for info! I'll try more today after work. No on pointy head. Gotta have good sense of humor in life and I do. Thanks, KP
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post #12 of 13 (permalink) Old Aug 6th, 08, 10:48 PM Thread Starter
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Ken
 
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Re: New BB Crate engine not wired correctly??

Sorry for late update-been busy with other things. Problem was carb(Holly 850) was dumping too much gas. With engine running at idle you could see gas dripping out of the jets into the throat and therefore flooding it our. I adjusted the fuel level in the bowls to the top of the drain screws and that took care of the xtra fuel. I retimed the engine and reconnected the vacuume advance. I still have mort fine tuning because it is still too rich but in the middle of this the fuel pump was way too loud and Mallory wanted me to send it to them for testing. I'll keep you guys posted after I get it back and refire the enging. By the way, the dist. seems to have been installed correctly and my wiring was good also. Thanks again, Ken
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post #13 of 13 (permalink) Old Aug 7th, 08, 04:51 AM
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Re: New BB Crate engine not wired correctly??

May wanna change the oil....could be runied with all the gas in it, and could mess up your motor.

VINCE
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