TeamCapri

Tech, Repairs, Upgrades => Capri N/A 89-94 => Topic started by: Snigalfriz on November 07, 2011, 09:47:00 AM

Title: "Dieseling" sound when accellerating
Post by: Snigalfriz on November 07, 2011, 09:47:00 AM

Folks my capri is making a "dieseling" sound when accelerating or at highway speeds, any ideas?

Title: "Dieseling" sound when accellerating
Post by: rcdraco on November 08, 2011, 12:27:00 PM

Test the coil, check the wires, and possibly change the gap to the tighter tolerance of .24 as suggested.

Title: "Dieseling" sound when accellerating
Post by: Snigalfriz on November 09, 2011, 04:24:00 AM

Thanks for the suggestions. I will be putting in new plugs, that I planned on installing last week, this evening and possibly wires.

Title: "Dieseling" sound when accellerating
Post by: blueamber on November 09, 2011, 08:23:00 AM

So what do you consider dieseling?  If its clattering like a diesel engine does, then that's valves starved for oil, or timing is off...what?...chris

Title: "Dieseling" sound when accellerating
Post by: Rocketman on November 09, 2011, 08:54:00 AM

Is it possible to take a video / sound clip of it?

Title: "Dieseling" sound when accellerating
Post by: Snigalfriz on November 09, 2011, 08:56:00 AM

will try to get a sound clip.

Title: "Dieseling" sound when accellerating
Post by: waretrop on November 09, 2011, 02:04:00 PM

Is it really dieseling or a spark knock?  I have the original books for both our Capri's (91 N/A and 93 N/A) and they both mention that N/A can have an occasional spark knock and not to worry.  Also very strong reading and referncing NOT to use hi-octane gas.  Kerry

Title: "Dieseling" sound when accellerating
Post by: rcdraco on November 09, 2011, 04:02:00 PM

Mine occasionally does this since I'm a bit rich and it does it primarily on cold starts after a more aggressive park.  But it normally clears out after 5 minutes of "blowing the carbon out" with about 1/4 throttle blips.

Title: "Dieseling" sound when accellerating
Post by: Snigalfriz on December 18, 2011, 08:02:00 AM

I can rev the engine in neutral, and you don't hear it.  When I am in gear and accelerating, you can hear it, or under any load like a 2nd gear start.

Title: "Dieseling" sound when accellerating
Post by: fayzaldean on December 18, 2011, 08:27:00 PM

check your timing

Title: "Dieseling" sound when accellerating
Post by: rcdraco on December 21, 2011, 06:58:00 AM

You sure it's not a wheel bearing?  Does the wheel vibrate at all, does the sound increase/decrease with speed?  And another thing it could be if it occurs only when in gear under load, it could be a bad transmission mount and it's buzzing in a way that makes a weird sound.

Title: "Dieseling" sound when accellerating
Post by: Rocketman on December 21, 2011, 08:02:00 AM

Does the car still have stock heat shields?

Title: "Dieseling" sound when accellerating
Post by: Snigalfriz on December 21, 2011, 07:20:00 PM

I will check the wheel bearings for play.  As far as I know it has the stock heat shields.

Title: "Dieseling" sound when accellerating
Post by: Snigalfriz on December 21, 2011, 07:21:00 PM

I will check the trans mounts as well.

Title: "Dieseling" sound when accellerating
Post by: rcdraco on December 22, 2011, 05:14:00 AM

Is there actually any noticeable reduction of power when it's making the noise?  If not I highly doubt that it has any sort of miss.  Granted, a high-end miss is possible; but very unlikely unless your plug wires are coated with oil or your plugs are bad.

Title: "Dieseling" sound when accellerating
Post by: rcdraco on December 22, 2011, 05:14:00 AM

Is there actually any noticeable reduction of power when it's making the noise?  If not I highly doubt that it has any sort of miss.  Granted, a high-end miss is possible; but very unlikely unless your plug wires are coated with oil or your plugs are bad.

Title: "Dieseling" sound when accellerating
Post by: Snigalfriz on December 22, 2011, 12:40:00 PM

No power loss.  The plugs and plug wires are new.

Title: "Dieseling" sound when accellerating
Post by: Snigalfriz on December 29, 2011, 07:14:00 PM

It was the timing, had it checked and set and the knock is gone.

Title: "Dieseling" sound when accellerating
Post by: Rocketman on December 29, 2011, 07:40:00 PM

Thank you for the update!

Title: "Dieseling" sound when accellerating
Post by: Snigalfriz on December 31, 2011, 04:14:00 PM

They called it a "spark knock".