 AAR year result on 1.7 FI | cold start suction means OK? |
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| Tdskip |
 Jan 11 2019, 01:25 PM
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Advanced Member  Group: Members Posts: 3,686 Joined: 1-December 17 From: soCal Member No.: 21,666 Region Association: None 
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First of all thank you for all your help and patience as I work through these issues on the ‘73 1.7 FI car.
I’m having idle and loss of power issues that I’m trying to get sorted out. Brand new MPS from Jeff 40 PSI fuel pressure at the pump outlet Just did a cold start test on the AAR by immediately pulling the hose that goes to the rubber install and I had suction there. That suggests that my AAR is OK and I should keep moving on to other components, correct?  |
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| BillC |
Jan 11 2019, 02:14 PM
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Senior Member Group: Members Posts: 536 Joined: 24-April 15 From: Silver Spring, MD Member No.: 18,667 Region Association: MidAtlantic Region
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I think your fuel pressure is too high. Have you checked the fuel pressure at the rail? The fuel rail should be about 28 psi.
And, yes, you should have suction at the inlet to the AAR at startup. The suction should diminish over time as the AAR closes. If the AAR doesn't close, you'll have a very high idle once the engine warms up. |
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Posts in this topic
Tdskip AAR year result on 1.7 FI | cold start suction means OK? Jan 11 2019, 01:25 PM
Tdskip Hi there, and happy Friday to you.
I have not che... Jan 11 2019, 02:16 PM BeatNavy Bill's right - ~28/29 psi +/- at the rail. On... Jan 11 2019, 02:23 PM Tdskip May be tomorrow before I can get my hands back on ... Jan 11 2019, 03:15 PM 914_teener Tom,
You can remove the AAR and bench test it by ... Jan 11 2019, 03:42 PM
JawjaPorsche Idle issues usually is a vacuum leak somewhere.
I... Jan 11 2019, 03:51 PM |
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