 A few technical questions |
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| hitbyastick |
 May 25 2005, 11:19 AM
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#1
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Newbie  Group: Members Posts: 37 Joined: 10-October 04 From: Fremont, CA Member No.: 2,918  |
Hello everyone,
Is the car supposed to idle at 1800RPM until it heats up? Then it goes right down to 1000. I'm assuming that's the aux. air regulator closing, although 1800 does seem high. What's the fuel pressure supposed to be? My old FPR would only stop leaking if it was fully closed so for a while it was running at 70psi, which I know is too high. I replaced it and it's right around 35. I think my TPS is not working properly. The car runs fine, but if I'm driving on the freeway and then just ease my foot down a little bit more on the accelerator, it misses a beat or two. When I give it a lot more gas (say I floor it) this does not happen. When I move the throttle by hand with the ignition on, the TPS "clicks" about 10 times. I'm assuming it's worn out. I have Yokohama AVS (195/65/15) in the fronts of my car and they are nearing the end of their life. I love these tires but I know I can't get any more. What is comparable? Thanks a lot, Mr. Christoph |
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| lapuwali |
May 25 2005, 11:49 AM
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#2
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Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743  |
Have to know more about the car. Is it D-Jet or L-Jet? If the answer to that is "huh?", then what year is the car, and what engine is in it (1.7, 1.8 or 2.0)?
The TPS on both isn't a smooth potentiometer, but a set of switches. For D-Jet there are about 8 switches. For L-Jet there are only two (idle and WOT). 35psi of fuel pressure is high for D-Jet (about 28psi is right), but in the ballpark for L-Jet. Your idle sounds fine. |
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| tat2dphreak |
May 25 2005, 12:00 PM
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#3
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stoya, stoya, stoya Group: Benefactors Posts: 8,797 Joined: 6-June 03 From: Wylie, TX Member No.: 792 Region Association: Southwest Region |
Hi everyone seems to love Falken Azenzis... I like BFG Gforce T/a KDW yoko makes good tires... you can also look at kumhos... those are good too |
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| hitbyastick |
May 25 2005, 12:05 PM
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#4
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Newbie Group: Members Posts: 37 Joined: 10-October 04 From: Fremont, CA Member No.: 2,918 |
Sorry should've specified. 74. D-Jet, 2.0. MSD Ignition and the MPS came out of a 73 (a tad more fuel at high RPM)
(IMG:http://www.914world.com/bbs2/html/emoticons/wavey.gif) |
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| lapuwali |
May 25 2005, 12:18 PM
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#5
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Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743 |
OK, so the clicking TPS is fine. I'd say your fuel pressure is too high, so you're always running rich, which may cause the hesitation you're feeling. The pressure should be 28-29 psi, not 35.
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| hitbyastick |
May 25 2005, 12:26 PM
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#6
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Newbie Group: Members Posts: 37 Joined: 10-October 04 From: Fremont, CA Member No.: 2,918 |
Thanks James. I'll tune it down. I think there may be something else too. If I lower the fuel pressure, would it idle even higher? The idle air screw is in as far as it'll go. I checked vacuum hoses and such, but it seems to be ok.
Adjustment on the ECU knob? Timing is dead on. |
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| bondo |
May 25 2005, 12:30 PM
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#7
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Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
Your AAR may be closing too slowly. It has a heating element in it that makes it close faster. It will still close from engine heat, but that takes much longer. Check to see if it's getting warm.
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