just wondering how many miles(soon) your rebuild motor needs to run before it can idle itself?

1)<500 miles
2)>500, but less than <1000
3)1000 or more, but < 2000
4)2000 miles or more

 

Hi Fong,

So let me get his straight..You motor is rebuilt and doesn't idle? It should if it doesn't. Try new plugs and make sure the timing is right. L-1 (right 5 deg mark) via pulley

 

you should be able to have you motor idle by itself after rebuild with only hours of iddling time... You have some setting that need to be adjusted...
tps?
Cas (timming)
maybe throttle cable is not attached properly... vacume leak!
This is the time to start investigating! There is something keeping your engine from iddling properly! Granted you will need to have it iddle a little high when you get your rebuilt engine for about 250 miles... but after that you should be able to maintain a steatdy 750-800 rock solid iddle!

 

My rebuild was Idling at 1500 rpms at Idle for the first 150kms. Now, 100kms later, I have It set at 1000 rpms. Are you sure you are posing your question correctly? I just want to make sure we understand your question.

 

I agree with silverrotor,
Is your engine not idling on it's own?
or are you having trouble holding a consistant solid idle?
and if that is the case how many k's do you have on it?

 

I just got my carr back with a fresh rebuilt. i have to hold dowm the gas for 5 seconds when i start it but after that it is ideling at 900-1200K rpms. so far i put 80 miles on it today.

 

hi, guys, thanks for all the replied. you are right, my first rebuilt motor is not idling. I have to hold the gas petal in order to make it run around 2000 rpm. I haven't driven it yet, cuz the car is not registered. I have ran the car at 2000 rpm for about an hour so far(on and off). I would think that is about 70miles or less.

I have wire tied most of the vacuum hoses, and replace injectors' O rings, and insulators. never adjust the TPS. and my friend set the CAS timing for me before he left for vacation. I am working alone now, so I can't check the timing myself, or check for any other problem underhood when I will be inside rev the car. but the throttle cable is hooked up right. so, I was thinking about the motor might need some more time to break in. that is why I want to check with you guys about how long I need to run the motor in order to make it idle itself(assuming no leaks).

thanks

 

Zero. My last motor started right up, and held an idle while it warmed up, first try. And it had 85 psi compression all the way around after it warmed up.

 

i had that happen to me when i had a vac leak....wouldnt idle unless i actually held the gas down for like 5 mins, then it idled at 1500 going up and down.

 

My TII's engine idles by itself just fine. I haven't put a single mile on it yet, and I only have about 5 minutes of run-time on it as well.

It's flooding like a bitch though. I drained a GALLON and a 1/2 of oil/gas from the sump yesterday. It was pouring from between the oil pan and block.

I wish the goddamn thing would just be problem free.

 

ummmm, interesting. I guess that couple things could happen here:

1)my motor might still need a few hour to break in in order to get good compression to idle on its own. I just ran it for an hour or less.
2)vacuum leak? unlikely, cuz I wire tired most of the hoses.
3)TPS or timing. (I will check this weekend if possible)

I wonder if I can adjust the fast idle screw? what about BAC? so far, I don't see any big smoke come out after it warms up. and the engine starts easy every time.

thanks

 

1) I don't think personally that your engine needs more time for it to iddle! Most engines will iddle the first time they are fired up. There is definitely something wron.

2) You can have a vacume leak from other places other than the hoses!
3)I think that it may be your TPS in this particular case. Also when you rev it to 2000 does it sound like it is reving properly or does it sound kinda choppy?

I would definitely get a hand from somebody to hold the engine at 1500 2000 while you have you head under the engine bay litneing for hissing (vacume leak) unever idling (bad timming) or anything else that may or may not be right. that way you can also adjust your iddle for now while she/he is holding the iddle for you.

Hope this info helps.

 

thanks, jreynish, I will check it out this weekend. by the way, where else could it leak from, besides the hoses, injectors?

thanks

 

it could possibly be leaking between;
upper intake to lower intake
or
lower intake to block
or upper intake to throttle body
these are potential vacume leaks if were not sealed properly with new gaskets! But you can use carburator cleaner to try and find the vacume leak (hopping there is one)

 

My rebuild idled at 800 perfectly, after fixing a vac leak