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| Hesitation? https://slantsix.org/forum/viewtopic.php?t=27521 |
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| Author: | 75plyduster [ Thu Feb 28, 2008 2:40 pm ] |
| Post subject: | Hesitation? |
My car has a hesitation when I slam on the gas pedal. Is this a problem or are they supposed to do that? My 2000 Jeep Grand Cherokee does it, but thats a totally different car. |
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| Author: | Evilsizer [ Thu Feb 28, 2008 2:42 pm ] |
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never had this problem on mine when it was running. i would be guessing as to why it would be it is. carb needs retuning maybe? |
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| Author: | 75plyduster [ Thu Feb 28, 2008 4:15 pm ] |
| Post subject: | |
I just rebuilt it. And I adjusted the idle, but I thought the rest of the adjustments were good. I guess Ill recheck them. |
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| Author: | SlantSixDan [ Thu Feb 28, 2008 4:22 pm ] |
| Post subject: | |
Does the car gasp and hesitate immediately when you floor the gas? Or does it lurch forward a little, then skip and hesitate? |
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| Author: | 75plyduster [ Thu Feb 28, 2008 4:37 pm ] |
| Post subject: | |
Hesitates immediatly. Could it be a vacuum leak? |
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| Author: | SlantSixDan [ Thu Feb 28, 2008 6:57 pm ] |
| Post subject: | |
Probably accelerator pump (try adjusting it for a longer stroke) and/or distributor vacuum advance — some of the mid-'70s cars have a very long throw on the vac advance, which means when you stomp the gas and the manifold vacuum goes to zero, the advance pod drops all its vacuum, which has the effect of immediately retarding the timing, particularly if your '75 is one of those that was originally configured with manifold vacuum, rather than ported vacuum, to the distributor vacuum advance. If the accel pump adjustment doesn't do it (and the pump actually works — check that), you might try disconnecting the vacuum advance hose and capping the carb nipple, then see what happens if you floor the gas. If the hesitation disappears, you'll want to rework your vacuum advance configuration (don't leave the hose disconnected for general driving-around) |
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