 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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| 73Phoenix20 |
Dec 28 2006, 07:56 PM
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Member Group: Members Posts: 334 Joined: 15-June 05 From: Michiana Member No.: 4,283 |
You know, the plugs COULD be fouled AGAIN! Did not check them after the pump got replumbed, and YES, it could have sucked up all the crap from the floor of the tank! Soooo.... Guess it wouldn't hurt to have the injectors cleaned and tested, even tho they were new a few hundred miles ago! The idea of checking the ECU setting is probably valid also; had not done that; as far as I know, it is the original factory setting, BUT.. after 34 years, no guarantees there!!!
After idle stabilizes, it seems fine at around 850 to 950 rpm... not always completely stable, but in that range... Timing and dwell have been checked by a very qualified mechanic (not me!) and all seemed well there, so back to the fuel delivery system... The car runs especially strong once "Off Idle" In fact, this is the best running factory injected 2.0 I have ever driven or seen, for that matter! Which could indicate it is set way too rich at the idle end of the spectrum??? It actually "feels" stronger than a very solid 2.0 factory six that I owned a few years back; yes, subjective, but... tons of low end Grunt and pulls all the way past redline in every gear! So... play with the idle adjustments and check the plugs and see what happens... Thanks to all of you for the ideas... if we find anything really indicative of the issue, I will post it! Enjoy the Holidays!!! |
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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 RonD Make sure timing, dwell is spot on. With points it... Dec 28 2006, 04:35 PM jkeyzer Some random thoughts:
Check the spark plugs and m... Dec 28 2006, 06:16 PM |
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