Slick 60's

429 big block in my 66 F100, It starts up great but once it is warm and I try to start it again, it cranks VERY slowly. It will start, but it turns over slowly and I have to push the gas pedal a couple times to get her going..My question is what could it be? My dad and I are thinking possibly the starter? Or it at least needs a heat shield, maybe its getting to hot as its right next to the manifold?

Any other ideas? All help greatly appreciated! Thank you, Garrett

incorrect timing maybe.

check cables and grounds. could be starter is bad. if you change the starter get a late model starter. its smaller and high torque.
http://www.db-starter-alternator.com/It ... %20SFD0011

So that starter will fit the 429? I think I am going to start there and then check the timing. Any other thoughts? I appreciate all the help!

Yeah I would check the starter and the battery first.
I try to run at the least a 800 cca battery.
What year 429 you got?
Late '60's to early '70's were high compression engines. Took some juice to spin one over.

My bet is the starter since it's doing this when it's warmed up.

Got any pics of your truck?
I'm putting 429 in my '65.

Check grounds too.

We went through all the grounds. All is good there. I think we are going to order a starter this week, that seems to be the problem. It cranks no problem when cold, but when warm it slows way down.

The battery is 800 I believe, I know it is at least 700. I will get some pictures this week, I wanted to take it up to a nice spot for pics but I can not right now since its having the problems.

thanks again guys!

Edit here are a couple quick pics, really bad lighting :

My 460 starts a little hard when hot and looks to have a recent starter but is not bad enough to worry about right now,you might need a more powerfull battery as that might be the problem with mine and as soon as its ready to hit the road I am going to look into a better battery.

Run down to auto crone or some other place and have the amp draw checked when starting hot. If you have a high compression engine, it will be farily easy to find out. bock numbers and head numbers will give you your first clue. Star with the head numbers. Anything with a C8, C9 Do and several others are high compression, but mostly look for anything that would be a high compression number Usually be pre 70 , although it ccould be late as there were some, but few. Sound like worn starer bushings to me and starter crag. A self fix would be to tke the starter apart and look on the armature for signs of it dragging on lfields. Install bushings which may be hard t ofind or not. If in no hurry find a starter shop usually can get bushings there. I can get starters rebuilt for as little as 25$ if that is all that is required. Otherwise , I agree with go for the gusto when buying a battery. If you have a high compression engine, get the biggest available, you will need it. Even if your battery is good, it may not be strong enough when the engine is hot. A strong electrical system is important with older engines with high compression. Back in the 60's we would have these problems and, we had good fuel back then, not the bear piss we have today. You don't just go replacing parts as this is just throwing money at a problem like our government does. Use what tools are available to you, including free checks at O'Rielly's and such. I'm not saying to depend on these people for the striaght skinny on anything. Use your own judgement. All the autoparts places are not ewual nor is their help. They are their to help and do, they are also there to sell parts. TAking the starter off and checking for starter wearr by dismatling the starter is low tech, but I would have the battery checked first . If weak but still usable this could still be your problme. Test by borrowing a really good battery and trying it out. Another simple test. We often jump to conclusions sometimes right and sometimes wrong. Why jump when you can prove.

Rich

Hmm, I don't know....might be something to do with that orange paint.


Just messing with ya, engine looks like it belongs there. Tell me that's not Gm orange...please.

You know, I had thought about saying something about the brand X color also.

Rich

I am not sure of the color, an older gentlemen owned the truck before us, and did a 90% resto on it. My dad and I picked it up and have been going through it working all the small kinks out here and there, and some aesthetic stuff too.

Im not a big fan of the orange, but when you hear her you forget its that color , Least its not a 'restored ford with chevy engine' no offense but that irritates me!!! LOL

Thanks for the help guys, looking at block numbers later today.