I wanted to thank all of you for your help with the quadrajet problem I had. It has been 3 weeks now through high and low temps ( 15 degrees) and the car starts and runs, can stop for twenty minutes and immeadiately starts again - without flooding. Warm up is required for about a minute ( just like my previous 72 with stock 350).
For those reader who may have a similar problem these were the steps required for the zz4 quad combo to work in all temperature extremes. Most of you know this already but for those who do not :
1. When installing the carb, make sure the gasket you use is completely covering the idle passages - some are TOO SMALL and cut right to the edge which can cause the idle screws to have alsmot no effect.
2. MAKE SURE you have 'ported vaccum' to the distributer. This is an easy mistake to make as even though the quads may look the same different years had ported and vac outlets switched! I know - found out the hard way. The way to check is to hold the line to the distributer - NO SUCTION should be present with the throttle plates almost closed ( idle). As soon as you increase RPM you should feel sution. That is the ported intake.
3.Electrtic choke Adjust - even though most will tell you that you should not move the setting more than one or two notches from center this is not true. For Example, on this car the LAST DOT is the correct setting for the choke. This required the choke be rotated COUNTER CLOCKWISE to align the last dot with the postion indicator on the choke housing.
4. PULL OFF ADJUST - this was perhaps the most difficult adjustment for although it is pretty forgiving in warm weather ( above 35 degrees) that is definitely not the case for very cold weather. The trick suggested by this site _ and that provided a happy ending to this particular project - was to physically watch the choke through the various starting scenarios. This requires that the AIR CLEANER be off. - pick a day when there is not too much sand or junk on the road if you actually drive the car for these tests.
This car would almost ALWAYS flood after it sat in cold weather AFTER having run for several miles.) It was not until I did this test that I saw why. The electric choke in cold weather would cool off after about ten minutes and force the choke closed. This despite the vaccum pull off trying to hold it open. If you did not step on the gas but just turned the key this would not happen and the car would start. However - the first time you hit the gas WHAM, the choke would close, flood the engine -usually in traffic- and you had to sit there with the trhottle to the floor clear it. Even after that it would be about ten minutes before the car ran properly again.
here is what I did:
Pick a sub 25 degree day. Warm the car - drive it a few miles. Stop the car. Wait 15 minutes. Start the car without touching the gas. Have the screw driver ready. Immeadiately or as fast as you can (- the choke is now heating up again) Blip the throttle manually- ADJUST the pull off ( and you may have to readjust the electric choke a bit) so that about a 1/4 inch of air passage is available to the carb while running. This will be enough to keep the engine running without flooding AND enable it to start up in the morning as well. Hope this information is useful to the next fella - again, thanks - michael sciarra
For those reader who may have a similar problem these were the steps required for the zz4 quad combo to work in all temperature extremes. Most of you know this already but for those who do not :
1. When installing the carb, make sure the gasket you use is completely covering the idle passages - some are TOO SMALL and cut right to the edge which can cause the idle screws to have alsmot no effect.
2. MAKE SURE you have 'ported vaccum' to the distributer. This is an easy mistake to make as even though the quads may look the same different years had ported and vac outlets switched! I know - found out the hard way. The way to check is to hold the line to the distributer - NO SUCTION should be present with the throttle plates almost closed ( idle). As soon as you increase RPM you should feel sution. That is the ported intake.
3.Electrtic choke Adjust - even though most will tell you that you should not move the setting more than one or two notches from center this is not true. For Example, on this car the LAST DOT is the correct setting for the choke. This required the choke be rotated COUNTER CLOCKWISE to align the last dot with the postion indicator on the choke housing.
4. PULL OFF ADJUST - this was perhaps the most difficult adjustment for although it is pretty forgiving in warm weather ( above 35 degrees) that is definitely not the case for very cold weather. The trick suggested by this site _ and that provided a happy ending to this particular project - was to physically watch the choke through the various starting scenarios. This requires that the AIR CLEANER be off. - pick a day when there is not too much sand or junk on the road if you actually drive the car for these tests.
This car would almost ALWAYS flood after it sat in cold weather AFTER having run for several miles.) It was not until I did this test that I saw why. The electric choke in cold weather would cool off after about ten minutes and force the choke closed. This despite the vaccum pull off trying to hold it open. If you did not step on the gas but just turned the key this would not happen and the car would start. However - the first time you hit the gas WHAM, the choke would close, flood the engine -usually in traffic- and you had to sit there with the trhottle to the floor clear it. Even after that it would be about ten minutes before the car ran properly again.
here is what I did:
Pick a sub 25 degree day. Warm the car - drive it a few miles. Stop the car. Wait 15 minutes. Start the car without touching the gas. Have the screw driver ready. Immeadiately or as fast as you can (- the choke is now heating up again) Blip the throttle manually- ADJUST the pull off ( and you may have to readjust the electric choke a bit) so that about a 1/4 inch of air passage is available to the carb while running. This will be enough to keep the engine running without flooding AND enable it to start up in the morning as well. Hope this information is useful to the next fella - again, thanks - michael sciarra
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