 Knock Knock, Sound Just At Starting |
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| windforfun |
 Nov 22 2023, 05:39 PM
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#1
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Advanced Member  Group: Members Posts: 2,019 Joined: 17-December 07 From: Blackhawk, CA Member No.: 8,476 Region Association: None 
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Does your 1.7 make a knocking sound just at starting? It happens just before the engine starts to run. Mine has always done this & I can't find anything loose or anything hitting anything within the engine bay. Normal? Thanks.
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| 914sgofast2 |
Nov 22 2023, 06:12 PM
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#2
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Senior Member Group: Members Posts: 663 Joined: 10-May 13 From: El Dorado Hills, CA Member No.: 15,855 Region Association: None |
Are you hearing the fuel pump's initial pumping sound to prime the injectors with gas, before the engine even fires up? If so, that is normal.
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| windforfun |
Nov 22 2023, 06:34 PM
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#3
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Advanced Member Group: Members Posts: 2,019 Joined: 17-December 07 From: Blackhawk, CA Member No.: 8,476 Region Association: None
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QUOTE(914sgofast2 @ Nov 22 2023, 04:12 PM)  Are you hearing the fuel pump's initial pumping sound to prime the injectors with gas, before the engine even fires up? If so, that is normal. Yes. The knocking occurs just before or perhaps during initial combustion on the passenger side. Maybe these are the last cylinders to get spark? Does start-up always use the same firing order? |
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| 914sgofast2 |
Nov 23 2023, 02:02 PM
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#4
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Senior Member Group: Members Posts: 663 Joined: 10-May 13 From: El Dorado Hills, CA Member No.: 15,855 Region Association: None |
QUOTE(windforfun @ Nov 22 2023, 04:34 PM) QUOTE(914sgofast2 @ Nov 22 2023, 04:12 PM) Are you hearing the fuel pump's initial pumping sound to prime the injectors with gas, before the engine even fires up? If so, that is normal. Yes. The knocking occurs just before or perhaps during initial combustion on the passenger side. Maybe these are the last cylinders to get spark? Does start-up always use the same firing order? You hear the fuel pump noise from the passenger side because that’s where the fuel pump is located. |
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Posts in this topic
windforfun Knock Knock Nov 22 2023, 05:39 PM
Root_Werks See if you can get a video of start up for us.
An... Nov 22 2023, 05:49 PM
Superhawk996
See if you can get a video of start up for us.
... Nov 23 2023, 08:21 PM rjames Do you have hydraulic lifters? Nov 22 2023, 06:05 PM GregAmy I am hell-bent on this topic, so not objective...c... Nov 22 2023, 08:58 PM 930cabman
I am hell-bent on this topic, so not objective...... Nov 23 2023, 07:11 AM GregAmy
Not just the torque, but more importantly the fit... Nov 23 2023, 07:15 AM Superhawk996
I am hell-bent on this topic, so not objective...... Nov 23 2023, 10:31 AM 930cabman "everything looks like a nail"
+1 SH Nov 23 2023, 11:56 AM GregAmy :DRUNK:
Yup. But then again, I had that same noi... Nov 23 2023, 12:14 PM Shivers Any idea how many miles on it. Worn P&C’s an... Nov 23 2023, 01:46 PM windforfun Does start-up always use the same firing order?
A... Nov 23 2023, 07:59 PM Superhawk996
Does start-up always use the same firing order? ... Nov 23 2023, 08:09 PM Superhawk996 Video is going to be your best bet to get some rea... Nov 23 2023, 08:20 PM |
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