 engine rpm, how responsive,, need tuning advice |
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| freezing14 |
 Nov 22 2004, 09:29 AM
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#1
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freezing14  Group: Members Posts: 435 Joined: 21-June 04 From: brockville , Ontario, Canada Member No.: 2,233  |
the car is a 72 1.7 ( bored to 1.8) d-jet
OK I finally got the engine in the car after the comlte restoration of the body,, ( when i got the car the engine was in a box) i got the whole thing to start upo just fine , it finally run without backfire ( the valve were tight) now it run good no oil leak, ( i still have not put the gas tank in and the drive axels) when i give gas right at the TB the response is fast but it seems like it takes time to go back down,, i know most of the car are different but my audi ( 2000 S4) rev down as fast as it goes up, my previous one a 96 A4 was quite a bit slower to go up and down anyone got a sound file of the rev and back to idle?? , what would cause the rev to stay up and go down slowly?? thanks |
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Replies(1 - 10)
| freezing14 |
Nov 22 2004, 03:19 PM
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#2
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freezing14 Group: Members Posts: 435 Joined: 21-June 04 From: brockville , Ontario, Canada Member No.: 2,233 |
anyone who has a microphone could record a " step on the gas and back to idle for me please, at least I will be able to compare,,,,please!!! (IMG:style_emoticons/default/pray.gif) (IMG:style_emoticons/default/confused24.gif)
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| scooter311 |
Nov 22 2004, 03:40 PM
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#3
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Member Group: Members Posts: 231 Joined: 22-October 04 From: Upstate NY Member No.: 2,986 |
Hey Freeze, I can't help with the audio, but mine snaps back really nicely. What type of throttle return is there on FI? Sticky throttle plate/shaft maybe? I had a bad cable that gave me the same symptoms. Wish I could be more helpful!
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| nebreitling |
Nov 22 2004, 04:51 PM
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#4
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Member Emeritus Group: Members Posts: 3,314 Joined: 26-March 03 From: San Francisco Member No.: 478 |
got a decel valve?
all hoses hooked up right? with a decel valve, rpms kinda "float" back down just a little bit. |
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| freezing14 |
Nov 23 2004, 07:38 AM
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#5
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freezing14 Group: Members Posts: 435 Joined: 21-June 04 From: brockville , Ontario, Canada Member No.: 2,233 |
I do have a decel valve , not 100% sure it works but it is hook correctly,, does it snap back faster without it, my throttle cable is not attached yet, so i give throttle at the TB and there is a very big spring on it,, by the way there is 2 way to adjust the idle on those d-jet, the knob on the computer and the knob on the TB ,, usually how many turns of the bottom for the TB screw????
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| SirAndy |
Nov 23 2004, 11:29 AM
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#6
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Resident German Group: Admin Posts: 41,709 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(freezing14 @ Nov 23 2004, 05:38 AM) does it snap back faster without it yes! just take it off and cap the hoses. it'll help the rpms go down faster ... (IMG:style_emoticons/default/wink.gif) Andy |
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| freezing14 |
Nov 23 2004, 11:51 AM
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#7
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freezing14 Group: Members Posts: 435 Joined: 21-June 04 From: brockville , Ontario, Canada Member No.: 2,233 |
how about the idle adjustment ,, TB or computer, how much of which??
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| SirAndy |
Nov 23 2004, 11:57 AM
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#8
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Resident German Group: Admin Posts: 41,709 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(freezing14 @ Nov 23 2004, 09:51 AM) how about the idle adjustment ,, TB or computer, how much of which?? the know on the brain is air-fuel-mixture, not idle ... the screw on the TB is for idle ... (IMG:style_emoticons/default/wink.gif) Andy |
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| freezing14 |
Nov 23 2004, 12:08 PM
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#9
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freezing14 Group: Members Posts: 435 Joined: 21-June 04 From: brockville , Ontario, Canada Member No.: 2,233 |
ok the knob on the computer is for a/f mixture, but the idle will change if you play with it, my be it is the cause of my sustaining gas , i will play with it tonight
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| SirAndy |
Nov 23 2004, 12:12 PM
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#10
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Resident German Group: Admin Posts: 41,709 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(freezing14 @ Nov 23 2004, 10:08 AM) ok the knob on the computer is for a/f mixture, but the idle will change if you play with it, my be it is the cause of my sustaining gas , i will play with it tonight how do the sparkplugs look ? (IMG:style_emoticons/default/idea.gif) Andy |
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| freezing14 |
Nov 23 2004, 01:44 PM
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#11
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freezing14 Group: Members Posts: 435 Joined: 21-June 04 From: brockville , Ontario, Canada Member No.: 2,233 |
they look brand new as i just put them in,, your gonna ask about the previous ones,, they were not there, the engine had been rebuit and the cylinder were filled with oil and a plastic plug in place so,, I think i will have to run a little longer until I get some color out of the plugs, hopefuly pale brown!!!!
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