 Low Idle Issue... Help!, Fresh 2.0 won't idle properly???? |
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| 73Phoenix20 |
 Dec 27 2006, 10:03 PM
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Member  Group: Members Posts: 334 Joined: 15-June 05 From: Michiana Member No.: 4,283  |
Got a puzzler that I know someone has had the misfortune to resolve in recent history! Newly rebuilt 2.0 4 banger, with virtually everything new; ran great until it started showing signs of extreme rich fuel mixture. Traced that back to a misplumbed fuel pump (imagine THAT ever happening!) which doubled the fuel pressure and consequently increased the amount of fuel delivered! That issue is now resolved, but now, when the car comes to a stop, the idle drops to just above "0" and tries to quit, but usually catches itself and then goes up to about 900 rpm, and is fine... Not critical but very irritating in an otherwise super strong running 2.0.
Guesses... Throttle Position Sensor? If so how to fix, or just find a replacement? Vacuum leak? Have all new lines and will be tackling that project this winter. Other ideas? Open to all suggestions... hate to just start throwing parts at it since many are not even available any more! Thanks in advance, Gang! (IMG:style_emoticons/default/beerchug.gif) |
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| RonD |
Dec 28 2006, 04:35 PM
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Ron Diederichsen Group: Members Posts: 102 Joined: 2-July 04 From: Boulder, CO Member No.: 2,286 Region Association: None |
Make sure timing, dwell is spot on. With points it takes a while to get it perfect.
That seemed to make a difference for me when I had issues like that. |
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| mightyohm |
Dec 28 2006, 06:16 PM
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Advanced Member Group: Benefactors Posts: 2,277 Joined: 16-January 03 From: Seattle, WA Member No.: 162 Region Association: Pacific Northwest  |
Some random thoughts:
Check the spark plugs and make sure they aren't fouled from running rich. Depending on how the fuel pump was plumbed, it might have been sucking gas in from the return port of the tank, and in doing so sucked in a ton of rust and other crap at the bottom of the tank. This gunk might be clogging the fuel injectors and causing a misfire on one or two cylinders at idle giving you the poor idle. Once it recovers from the low idle and goes back up to 900, how does the idle sound and feel? Is it perfect or still lumpy? Will it keep idling at 900 indefinitely? It could also be that you dont have the decel valve plumbed correctly. I would probably start with the basics - make sure everything is hooked up correctly, then go thru the ignition system, points, timing, etc. Then adjust the valves, etc. You are bound to find it eventually. |
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Posts in this topic
73Phoenix20 Low Idle Issue... Help! Dec 27 2006, 10:03 PM
Jeffs9146 FI or Carbed?
If it is FI I would check the CHT g... Dec 27 2006, 10:13 PM 73Phoenix20 100% original and stock Fuel Injection... Brand n... Dec 27 2006, 10:17 PM TROJANMAN my fresh 2.0 did the same after about 200-300 mile... Dec 27 2006, 10:17 PM rmital ....bad injector....leaky, running rich at idle ca... Dec 28 2006, 07:04 AM vsg914 Could be running rich at idle. Try adjusting the i... Dec 28 2006, 07:16 AM
rmital
Could be running rich at idle. Try adjusting the ... Dec 28 2006, 07:38 AM solex Did you check the CHT and the intake are temp sens... Dec 28 2006, 08:03 AM Jeffs9146 I put a new CHT in and had the same problem. It tu... Dec 28 2006, 12:05 PM 73Phoenix20 You know, the plugs COULD be fouled AGAIN! Di... Dec 28 2006, 07:56 PM |
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