 Revs dip on light throttle, Otherwise perfect! |
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| gturner008 |
 May 9 2020, 02:30 PM
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#1
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Member  Group: Members Posts: 127 Joined: 21-April 20 From: Toronto Member No.: 24,163 Region Association: Canada  |
A little bit of experience and wisdom needed.
I’m new to 914 - so don’t know if this is normal for the 2.0 1976 engine. Engine runs perfectly. Great starter. Smooth and easily revs. Very happy. But I noticed when it’s ticking over - and I gently rest my foot on the throttle - and apply a tiny bit of pressure, the revs dip - and it almost wants to die. Apply more pressure or quick pressure, and it picks up perfectly. Any ideas on what might causing this? Or is it a characteristic of this engine and injection system? Very grateful for any thoughts. Thanks. Gary |
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| BillC |
May 11 2020, 02:55 PM
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#2
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Senior Member Group: Members Posts: 628 Joined: 24-April 15 From: Silver Spring, MD Member No.: 18,667 Region Association: MidAtlantic Region 
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QUOTE(gturner008 @ May 9 2020, 04:30 PM)  A little bit of experience and wisdom needed. I’m new to 914 - so don’t know if this is normal for the 2.0 1976 engine. Engine runs perfectly. Great starter. Smooth and easily revs. Very happy. But I noticed when it’s ticking over - and I gently rest my foot on the throttle - and apply a tiny bit of pressure, the revs dip - and it almost wants to die. Apply more pressure or quick pressure, and it picks up perfectly. Any ideas on what might causing this? Or is it a characteristic of this engine and injection system? Very grateful for any thoughts. Thanks. Gary Sounds like one of the tracks in the throttle position sensor (the one for the "accelerator pump" function) might be worn away, in the just-off-idle area. IIRC, 914Rubber has replacement board kits available. Might be worth taking a look at. I did mine a while ago, and it should only take a couple of hours to do, from start to finish, including recalibrating the TPS. |
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| ctc911ctc |
May 11 2020, 05:59 PM
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#3
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Senior Member Group: Members Posts: 1,124 Joined: 9-June 18 From: boston Member No.: 22,206 Region Association: North East States
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QUOTE(BillC @ May 11 2020, 02:55 PM) QUOTE(gturner008 @ May 9 2020, 04:30 PM) A little bit of experience and wisdom needed. I’m new to 914 - so don’t know if this is normal for the 2.0 1976 engine. Engine runs perfectly. Great starter. Smooth and easily revs. Very happy. But I noticed when it’s ticking over - and I gently rest my foot on the throttle - and apply a tiny bit of pressure, the revs dip - and it almost wants to die. Apply more pressure or quick pressure, and it picks up perfectly. Any ideas on what might causing this? Or is it a characteristic of this engine and injection system? Very grateful for any thoughts. Thanks. Gary Sounds like one of the tracks in the throttle position sensor (the one for the "accelerator pump" function) might be worn away, in the just-off-idle area. IIRC, 914Rubber has replacement board kits available. Might be worth taking a look at. I did mine a while ago, and it should only take a couple of hours to do, from start to finish, including recalibrating the TPS. (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) |
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Posts in this topic
gturner008 Revs dip on light throttle May 9 2020, 02:30 PM
gturner008 Thank so much. Very helpful.
What do you think a... May 11 2020, 07:55 PM Bartlett 914 The cover comes off easily. You can clean the cont... May 12 2020, 07:24 AM gturner008 Eventful day.
Took off the TPS, got inside. Phot... May 12 2020, 03:38 PM PlaysWithCars The trace for the "accelerator pump" isn... May 12 2020, 09:56 PM gturner008 Bingo!
I scribed the position at the start, b... May 13 2020, 11:37 AM
gturner008 Update. I now get the slight hesitation at 1500 rp... May 13 2020, 02:25 PM |
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