66 transistorized ignition hard warm start

[Gary W.]

Is there any special issues with the transistorized ignition utilized with a 66 big block. The motor seems hard to start after it has warmed up. There is no problem with a cold start. Only after it warms up does it become problematic. Thanks for the help.

[Joel T.]

Re: 66 transistorized ignition hard warm start

Gary;

Is the amplifier box original? Original amplifier boxes used germanium transistors which were prone to heat problems. That could be your problem. There are replacement box internals which deal with the heat much better.

Joel

[William L.]

Re: 66 transistorized ignition hard warm start

Gary; I used to have hot hard start problems with my 67 BB. Was using a new solid state TI box from a suppler and had no luck with it or them. Then I bought a new TI board from K&B Special Products, they advertise in Driveline, and it has worked GREAT ever since. Give them a call maybe they can help you out.
A satisfied customer
Bill

[Clem Z.]

Re: 66 transistorized ignition hard warm start

Is there any special issues with the transistorized ignition utilized with a 66 big block. The motor seems hard to start after it has warmed up. There is no problem with a cold start. Only after it warms up does it become problematic. Thanks for the help.

when it starts up does it blow black smoke because that could be because the carb is flooding ?

[Duke W.]

Re: 66 transistorized ignition hard warm start

How do you know it's the ignition an not a fuel percolation problem?

Duke

[Michael H.]

Re: 66 transistorized ignition hard warm start

when it starts up does it blow black smoke because that could be because the carb is flooding ?

I think Clem and Duke are headed in the right direction. The new fuel does indeed cause some minor flooding problems during a hot restart.

I installed a new M&H board in the TI box on my 425 HP car. BIG improvement over the old Delco board under all conditions!!

[Timothy B.]

Re: 66 transistorized ignition hard warm start

I think in 66 the amplifer is mounted to the inner fender so double check the grounds at the core support and amp. I agree about the gas.

[Gary W.]

Re: 66 transistorized ignition hard warm start

Thank you all for your responses. I will get to work on your suggestions.

[Alan D.]

Re: 66 transistorized ignition hard warm start

Gary,
"The motor seems hard to start after it has warmed up." Please describe what "hard to start" is! Does it turn over at same rate as when cold? OR and son on. Need to get a better under standing of problem before we go after a fix. You may be just chasing a fix by replacements which can get expensive.

Comment on TI - had no start problems after warm up with mine, some moisture had gotten into box and when it warmed up the moisture would expand thus shorting out. Also agree with those suggestions above on Amp replacements.

[Ken A.]

Re: 66 transistorized ignition hard warm start

Is there any special issues with the transistorized ignition utilized with a 66 big block. The motor seems hard to start after it has warmed up. There is no problem with a cold start. Only after it warms up does it become problematic. Thanks for the help.

Forget the fuel suggestions and concentrate on the pickup coil. Warm start=slower cranking speed=weaker output from the pickup coil. You need at least 1.4 volts AC to trigger the STOCK amp to fire the coil. Remember your distributor is a generator in this circuit.

[Gary W.]

Re: 66 transistorized ignition hard warm start

It will crank. Just not at the rate when it is cold. I am beginning to think the transistorized ignition isn't wired correctly.

Gary

[Gary W.]

Re: 66 transistorized ignition hard warm start

Ken: I think you are on the right track. The cranking speed is slower when warm. I am thinking the TI system isn't wired correctly. Isn't there supposed to be a wire running to the starter?

Gary

[Clem Z.]

Re: 66 transistorized ignition hard warm start

Ken: I think you are on the right track. The cranking speed is slower when warm. I am thinking the TI system isn't wired correctly. Isn't there supposed to be a wire running to the starter?

Gary

if the cranking speed is slower your problem is not the TI system. you need to check the starter and the starter wiring. here is the wiring diagram for the TI systems. if these are too small to read go to page and then to zoom and click on 200%

[Gary W.]

Re: 66 transistorized ignition hard warm start

I just installed a new starter. I don't think the "pink" wire from the TI system is connected to the starter (as shown in the diagram). I will check that out first. Thanks for the help.

[Michael H.]

Re: 66 transistorized ignition hard warm start

I just installed a new starter. I don't think the "pink" wire from the TI system is connected to the starter (as shown in the diagram). I will check that out first. Thanks for the help.

That would certainly cause a "no start". It wouldn't start very well cold or hot though, unless someone has the "ignition for cranking" coming off of the "ignition for the run circuit".

The solenoid terminal provides unresisted 12V power to the T.I. system during cranking. Once the engine starts and the key is released back to the run position, that terminal/wire should show a reduced voltage value. (5V..6V..7V..??)