 Hard starting, low hunting idle, until it warms up? |
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| Geezer914 |
 May 27 2017, 09:30 AM
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Geezer914  Group: Members Posts: 1,460 Joined: 18-March 09 From: Salem, NJ Member No.: 10,179 Region Association: North East States 
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1975 1.8L Ljet injection. Car is hard to start. It takes 3-4 tries and some time a shot of starting fluid. Fuel pressure gauge reads 30 lbs. in engine compartment. The rpm rises to 1800 rpm for about 15 seconds, then the idle hunts between 500 rpm and almost stalling out. After the engine warms up it runs and starts as normal. Vacuum hoses are tight. Comments? (IMG:style_emoticons/default/confused24.gif)
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| TheCabinetmaker |
May 27 2017, 02:40 PM
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#2
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I drive my car everyday Group: Members Posts: 8,304 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
If the cht is unplugged, it goes full rich. Not his problem. The aar stuck closed will not let in auxiliary air (the aa in aar) when cold to compensate for the extra fuel added by the ecu from the signal from the cht.
Geezer, unplug the hose from the out port of the aar and start the engine cold. If it idles up and runs fine cold, then the aar is faulty. |
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Posts in this topic
Geezer914 Hard starting, low hunting idle, until it warms up? May 27 2017, 09:30 AM
The Cabinetmaker Aar? May 27 2017, 09:36 AM Beebo Kanelle Gasoline filter will allow pressure to build, but ... May 27 2017, 09:50 AM Rob-O So much to test for, but in my opinion (and I just... May 27 2017, 12:31 PM Geezer914 Checked the AAR regulator with an ohm meter and it... May 28 2017, 12:39 PM
timothy_nd28
Checked the AAR regulator with an ohm meter and i... May 31 2017, 01:34 PM jim_hoyland I've found the same condition on occasion too:... May 29 2017, 06:00 AM Geezer914 Installed new intake runner gaskets, intake hoses,... May 31 2017, 12:10 PM jim_hoyland
Installed new intake runner gaskets, intake hoses... May 31 2017, 12:38 PM Geezer914 Head temp spec is 2500 to 3000 when cold. Correct... May 31 2017, 05:10 PM timothy_nd28 280k ohms > 2.5-3.0k ohms, still out of spec. ... May 31 2017, 06:15 PM Geezer914 I checked the connection from the AFM to the dual ... Jun 1 2017, 05:44 AM Geezer914 Tested AFM:
pins 6 & 9 200-400 ohms 282
pi... Jun 1 2017, 06:42 AM timothy_nd28 I don't think there is anything majorly wrong ... Jun 1 2017, 10:22 AM Geezer914 Thanks everyone for taking the time to post replie... Jun 2 2017, 05:52 AM porschetub I don't usually comment on running faults with... Jun 2 2017, 02:43 PM |
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