Engine stall at stop signs !, newest prob w/the six project. |
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Engine stall at stop signs !, newest prob w/the six project. |
DougC |
Oct 31 2005, 09:48 AM
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#1
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Senior Member Group: Members Posts: 949 Joined: 6-July 04 From: Dallas, TX Member No.: 2,307 |
(2.7L w/CIS) Ok, I replaced my fuel pump this weekend and the engine fired right up just fine. I had to adjust the throttle linkage to get it to idle at an exceptable rpm and not die. When I took it out for a run around the neighborhood it would want to die at the stops. Could this be a vacuum leak? I think my vent hose from the engine case to the oil tank may be slightly too short. Could timing cause this also? While I was initially trying to get it to idle it would sometimes start a pulsating rythem until it would die. suggestions?
PS - oh, BTW it ran really strong during my blast around the neighborhood (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) Doug C |
ClayPerrine |
Oct 31 2005, 09:51 AM
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#2
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Life's been good to me so far..... Group: Admin Posts: 15,474 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
Did you hook up the Aux air regulator?
Also, adjusting the throttle linkage is NOT the way to get the idle up. There is an idle speed screw on the throttle body. Do you want me to come over again? |
Jeroen |
Oct 31 2005, 09:51 AM
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#3
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914 Guru Group: Members Posts: 7,887 Joined: 24-December 02 From: The Netherlands Member No.: 3 Region Association: Europe |
don't change a thing... this is a great opportunity to learn to heel-and-toe (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif)
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lapuwali |
Oct 31 2005, 10:12 AM
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#4
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Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743 |
The pulsating rhythm is lean surge, and is caused by too lean an idle mixture. There's an adjustment for this on the top of the airflow meter, or you may have another air leak after the airflow plate.
Clay's right in that you don't futz with the linkage to get it to idle. Use the idle air bypass screw for this. If you plumb in the aux air regulator AND IT WORKS, then you should have a higher idle while the engine is cold. If you just cap this stuff off, then you'll need to hold the throttle open with your foot until it warms up, which may take several minutes. Adjust your idle with the engine HOT, as in take it out on the highway for 15-20 min at least. Timing that's not advanced enough can cause a slow idle, yes. Once you can get the engine to run long enough to get it fully warmed up, set the idle (with the bypass screw), then set the timing, then set the idle again (it will change if the timing was off). |
DougC |
Oct 31 2005, 10:18 AM
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#5
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Senior Member Group: Members Posts: 949 Joined: 6-July 04 From: Dallas, TX Member No.: 2,307 |
Yes... (IMG:http://www.914world.com/bbs2/html/emoticons/headbang.gif) .... (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) I will PM you. Aw, believe me I was using the old toe/heel technique as much as I could to keep it lit. Doug C |
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Ferg |
Oct 31 2005, 10:46 AM
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#6
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914 Guru Group: Members Posts: 5,948 Joined: 8-January 03 From: Boulder CO Member No.: 116 Region Association: None |
(IMG:http://www.914world.com/bbs2/html/emoticons/agree.gif) I bet you are running a tad lean... remember last time the mixture was set that motor lived at 5500 ft. Take it somewhere that has a gas analyser machine and using above mentioned tips for idle and you'll be all set. (IMG:http://www.914world.com/bbs2/html/emoticons/driving.gif) Ferg |
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DougC |
Oct 31 2005, 11:27 AM
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#7
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Senior Member Group: Members Posts: 949 Joined: 6-July 04 From: Dallas, TX Member No.: 2,307 |
Mike, thanks for reminding me of the altitude difference - that's definately something to consider. Actually Clay had to richen it up one notch to get it to start in the first place, it may still need a little more though. This engine sounds much better than I had expected it to especially under excelleration. OK, back to twisting Clay's arm.. (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)
Doug C |
charvey |
Oct 31 2005, 02:36 PM
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#8
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Newbie Group: Members Posts: 6 Joined: 16-February 05 From: Moscow, Id Member No.: 3,615 |
check the alternator belt, mine broke at one point and i had the same problem
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ClayPerrine |
Oct 31 2005, 02:39 PM
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#9
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Life's been good to me so far..... Group: Admin Posts: 15,474 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
If the alternator belt breaks on a six, you have bigger problems than a loss of voltage. The fan is not turning, and the engine will quickly overheat. Ferg, were you the previous owner of the engine? |
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Ferg |
Oct 31 2005, 02:58 PM
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#10
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914 Guru Group: Members Posts: 5,948 Joined: 8-January 03 From: Boulder CO Member No.: 116 Region Association: None |
Yes, I'm the PO, but the PPO owner is who originally built it. Ferg. |
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ClayPerrine |
Oct 31 2005, 03:04 PM
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#11
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Life's been good to me so far..... Group: Admin Posts: 15,474 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
That means that I gotta richen the mixture. Time to dig out the CO meter.
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Jeroen |
Oct 31 2005, 04:28 PM
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#12
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914 Guru Group: Members Posts: 7,887 Joined: 24-December 02 From: The Netherlands Member No.: 3 Region Association: Europe |
just janking yer chain... but that is how I actually learned it, in a crappy old car that would stall at the lights (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif) |
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