here i go again poor preformance
Leave the ECM connected, while doing the base idle adjust the ecm wont be able to adjust/compensate as the timing bypass connector and iac valve are disconnected while setting the 400 rpm in drive.
i had to disconect the brown wire at the driver side because i was going to move the distributor.
My timing was out the scale. so the most i can do was set my timing to 10* btdc. i had to play with the timming screw and the distributor to get to that point.. if I go closer to
6*btdc the car will stall and them stop. so again the best i can go was 10*btdc.
at this time the IAC was disconected also the brown wire on diver side. i check the tps the reading was 0.51 so i reset to 0.54 at idle
the car was idle much better but again only at parking gear. if i move the gear to drive or revese the car stall and engine stop. again imposible to drive.
I reconect the IAC and the brown wire. and start the car again.
the feeling the same. better idle at parking. stall and stop when go on drive and reverse.
I can not tell what is the rpm at idle. since i can not read my dash. but sound like 1000 rpm. what i meant is higher that 400 rpm
I made a video the sound is very poor quality. because is from my cell phone.
there you can see when i put the car gear.
Last edited by hitmanpty; Mar 5, 2013 at 06:32 PM.
i had to disconect the brown wire at the driver side because i was going to move the distributor.
My timing was out the scale. so the most i can do was set my timing to 10* btdc. i had to play with the timming screw and the distributor to get to that point.. if I go closer to
6*btdc the car will stall and them stop. so again the best i can go was 10*btdc.
at this time the IAC was disconected also the brown wire on diver side. i check the tps the reading was 0.51 so i reset to 0.54 at idle
the car was idle much better but again only at parking gear. if i move the gear to drive or revese the car stall and engine stop. again imposible to drive.
I reconect the IAC and the brown wire. and start the car again.
the feeling the same. better idle at parking. stall and stop when go on drive and reverse.
I can not tell what is the rpm at idle. since i can not read my dash. but sound like 1000 rpm. what i meant is higher that 400 rpm
I made a video the sound is very poor quality. but is from my cell phone.
there you can see when i put the car gear.
Hi
I was unable to play the video on my mobile, but if your dash does not display your idle rpm you cannot set your base idle at all

You will need to connect a tacho to see what rpm you have exactly, untill then you cannot set your base idle, without that having been set the ecm will not be able to manage your engine as it needs those things to be correct first. (VERY IMPORTANT)
That is why your engine stalls when you put it in gear untill you can set your base idle, easy starting and smooth idle is not able to be achieved. And the ecm will have no idea what it is doing, that is why you are having this problem.
Just to mantion I try to do this base idle stuff some time ago. when my dash was working ok. I recall de same problem. it was imposiblem to get to that 400 rpm. Iam sure if i fix the dash. the same thing will happend i can not set the rpm to 400.
how about the timing. I dont need to know the rpm to set my timing to 6*btdc. and is imposible to set the timing right. what is preventing me to set the coreect timing.??????
I have seen so many videos , post explanations. but I can not get close to that mark.
So you have the TPS set correctly and once you get the timing right and can confirm the correct 400 rpm in drive when you get your dash working it should all fall into place and start easilly hot or cold and have very little effect when a load is put on like putting the car into drive, remember any turn of the idle adjust scew will need the TPS volts to be checked again.
Looks like just your distributor needs to be moved one tooth if you cannot get it near 6 deg btdc... Almost there

Check the ground wires on block above the oil filter and there are also some on the belhousing to block bolts, driver side i think from memory
Last edited by gerardvg; Mar 5, 2013 at 09:29 PM. Reason: More info
Once you have the timing right and TPS volts with the 400 rpm in drive she will be good to go!
Reconnect the iac valve and reconnect the timing bypass connector and she will start instantly then have a high idle 1200 rpm for a few moments then drop to 600 rpm.
That is what my vette does every time I start her she fires up very quickly without needing to touch accelerator goes to 1200 rpm and settles down to 600 rpm.
Good luck
Hopefully good news tommorrow
The Best of Corvette for Corvette Enthusiasts
but I try to start the car and no start condition
here is my distributor before moving.
[IMG]
[/IMG]here is the distributor after moving one tooth conter clock wise.
[IMG]
[/IMG]
i have the number 1 cylinder at tdc. on the compression stroke. and the balancer mark on 0.
but the car have no start condition at this possition.
maybe there is a tooth between the old rotor possition and the new one. maybe i mist that tooth in between.
dont want to come back to the old possition. the car is not have good preformance on that old position.
but I try to start the car and no start condition
here is my distributor before moving.
[IMG]
[/IMG]here is the distributor after moving one tooth conter clock wise.
[IMG]
[/IMG]Hi
The distributor position at top dead center with rotor between 1 and 8 as your first picture IS CORRECT, the second picture with the distributor one tooth counter clockwise has retarded the distributor.
The distributor moves clockwise and firing order is 18436572,
With the distributor bolted in position as in the first picture, when you rotate it slightly anticlockwise (not removing repositioning). That advances the ignition and should get your 6 deg before top dead center. If you cannot get the 6 deg btdc you need to remove the whole distributor and move it one tooth CLOCKWISE to advance it one tooth. However with the distributor in your first pick if it is at tdc on compression stroke you should be able to get the 6 deg timing unless your harmonic balancer timing mark is of.
Good luck
I have been able to run my engine with the distributor in both positions you have so you have to confirm it is on top dead center of compression stroke, maybe take the rocker cover of and confirm the exhaust valve opens when you turn your engine half a turn.
Last edited by gerardvg; Mar 6, 2013 at 09:15 PM. Reason: more info
Good luck
I have been able to run my engine with the distributor in both positions you have so you have to confirm it is on top dead center of compression stroke, maybe take the rocker cover of and confirm the exhaust valve opens when you turn your engine half a turn.
when tou samove the rotor to advance. that will be clock wise or conter clock wise. getting a little confuse here. iam positive is a top death center











I was gonna say the same thing, then I refreshed saw the page, and everyone else beat me to it. h

