cjhillman
Posted a lot
1979 Capri (Rolling Project) 1985 Escort mk3 (Daily)
Posts: 1,588
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Jan 22, 2019 17:44:15 GMT
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Is my Car Pinging? I was listening to an episode of NPR's Car Talk and they discussed this topic. I wondered if the rattling sound i hear when i accelerate isn't as i thought the Exhaust rattling but, actually coming from the engine its self??
Its been like this for about a year so i guessed it was just the exhaust rattling but now ive started thinking it doesnt make the sound over bumps etc and always in low revs in all gears except 1st. It pulls like a train (for a 1.1) I've done about 5000 miles at least with it like this.
Maybe i need to stop listening to Car Talk... its giving me Car anxiety!!
Check out this video you hear it at 11 seconds briefly and better at 16 seconds
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Last Edit: Jan 23, 2019 23:48:51 GMT by cjhillman
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ChasR
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Club RR Member Number: 170
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Is my Car "Pinking"?ChasR
@chasr
Club Retro Rides Member 170
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Jan 22, 2019 18:22:49 GMT
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The video doesn't work for me.
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cjhillman
Posted a lot
1979 Capri (Rolling Project) 1985 Escort mk3 (Daily)
Posts: 1,588
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Jan 22, 2019 18:45:39 GMT
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The video doesn't work for me. sorry on second .. i set it to private . Should be working now.
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Last Edit: Jan 22, 2019 18:47:37 GMT by cjhillman
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Jan 22, 2019 19:08:50 GMT
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Pinking is usually caused by the fuel timing being out or bad plugs. The noise you're hearing is the piston being knocked back down whilst it's on the way up it's stroke.
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cjhillman
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1979 Capri (Rolling Project) 1985 Escort mk3 (Daily)
Posts: 1,588
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Jan 22, 2019 19:17:19 GMT
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Pinking is usually caused by the fuel timing being out or bad plugs. The noise you're hearing is the piston being knocked back down whilst it's on the way up it's stroke. ok, is there a name for that problem? i've never really thought much of it till now as it seems to run ok.
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Jan 22, 2019 19:22:00 GMT
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Pinking, pinging, ignition knock, pre-detonation, knock and/or detonation are some of the common names for it.
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cjhillman
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1979 Capri (Rolling Project) 1985 Escort mk3 (Daily)
Posts: 1,588
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Jan 22, 2019 19:26:23 GMT
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Cheers, I'll probably take it to the garage to get them check it out. I'm guessing its one of those things that could explode at any time?
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Jan 22, 2019 19:34:48 GMT
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If it's really bad it can cause pretty hefty damage, from a head gasket (due to the increased pressure) to holes in pistons.
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Jan 22, 2019 20:01:46 GMT
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try a branded super unleaded if the fuels curse word ie supermarket stuff the older engines tend to pink under acceleration
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Jan 22, 2019 20:22:34 GMT
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Can't really hear on that video on my phone, pinking will sound like some one shaking drawing pins in a tin under load, usually caused by the ignition being too far advanced, get a strobe on it and check your ignition timing
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Last Edit: Jan 22, 2019 20:28:55 GMT by fordperv
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slater
Club Retro Rides Member
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Club RR Member Number: 78
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Is my Car "Pinking"?slater
@slater
Club Retro Rides Member 78
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Retard the timing a touch and see if it goes away. You should do this when running a car designed for leaded fuel on unleaded..
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ChasR
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Is my Car "Pinking"?ChasR
@chasr
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It does sound like it is.
The best thing to do is to grab a timing light as said, and revert the timing to stock figures. While you are there, check the distributor is doing what it should be doing. That is:
-At idle, staying at the recommended timing before top end centre (BTDC), and not really waving around -At the recommended RPM, advancing to the higher desired number, with it not get there earlier in the RPM range or later.
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cjhillman
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1979 Capri (Rolling Project) 1985 Escort mk3 (Daily)
Posts: 1,588
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Jan 23, 2019 11:14:26 GMT
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Cheers for the help guys. I've booked it into my local garage for in a couple of weeks. if i get chance in the meantime i'll try get a timing light and check it out. they're going to check the tappets as well. Bit gutted as i wanted to do that but also its my only motor so i should get it done professionally i guess. Never really thought about this too much till now hopefully it'll be alright.
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Jan 23, 2019 11:39:32 GMT
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Just do NOT use supermarket fuel and whilst waiting for it to go in to be checked, maybe consider using a pour in octane booster from Halfrauds. Even my 2010 Diesel Kia pinks if I use supermarket fuel!
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96 E320 W210 Wafter - on 18" split Mono's - Sold :-( 10 Kia Ceed Sportwagon - Our new daily 03 Import Forester STi - Sold 98 W140 CL500 AMG - Brutal weekend bruiser! Sold :-( 99 E240 S210 Barge - Now sold 02 Accord 2.0SE - wife's old daily - gone in PX 88 P100 2.9efi Custom - Sold
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cjhillman
Posted a lot
1979 Capri (Rolling Project) 1985 Escort mk3 (Daily)
Posts: 1,588
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Jan 23, 2019 17:13:37 GMT
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Cool i found it! If its the timing thats off would this do anything though? Sorry if this is a stupid statement . I'll also fill up with the Super Unleaded stuff too at Shell. To be honest i hardly ever use the supermarket fuel stations as theres non around here.
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ChasR
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Posts: 10,195
Club RR Member Number: 170
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Is my Car "Pinking"?ChasR
@chasr
Club Retro Rides Member 170
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Jan 23, 2019 19:58:02 GMT
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It may help.
FWIW My M3 will sometimes pink on supermarket fuel. That used to often see 95 and 98. It's now V-Power or Tesco Momentum that it sees or BP Ultimate etc., even Sainsburys 97 if I am really stuck. All is now well.
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Last Edit: Jan 23, 2019 19:58:58 GMT by ChasR
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cjhillman
Posted a lot
1979 Capri (Rolling Project) 1985 Escort mk3 (Daily)
Posts: 1,588
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Jan 23, 2019 23:48:31 GMT
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alright so after a red wine i started looking at ignition Guns and went to get the manual out of a very frozen Escort. I'm looking at cheap ones in case it still needs to go to the garage as they'll charge me a bit down here... www.amazon.co.uk/HOMCOM-Ignition-Diagnostic-Inductive-Automotive/dp/B07K18M3Y4/ref=sr_1_1_sspa?ie=UTF8&qid=1548283809&sr=8-1-spons&keywords=ignition+timing+light&psc=1It looks like a 1985 OHV has to be 6 degrees BTDC, so thats 6 Degrees retarded right? at 750-850 RPMs. In the book it says 0 is TDC so surly 6 would be advanced right? unless its the other way round? Also I don't have a rev counter so what would you do in this situation? Also the manual mentions setting the Rotor arm pointing at number 1 piston and all the videos ive seen didnt mention that. My layman's version of this is: 1) get the car warmed up 2) block off the vacuum 3) plug the timing gun onto the battery and number 1 spark plug lead. 4) check the timing against the marks and adjust by moving the distributor. ( i also saw a guy use tipex to see the mark he needed against the pully, anyone else done this?) heres that video: Here are the pages to my Haynes manual. I'm not sure if its just overly complicating the job. I'll probably do this after the next couple hundred miles i need to cover... busy week and i guess its been like this for the last year now haha.
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Last Edit: Jan 23, 2019 23:50:07 GMT by cjhillman
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tristanh
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Routinely bewildered
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Jan 23, 2019 23:54:48 GMT
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Btdc means Advanced. All cars run a bit of ignition advance, ie the spark happens before the piston gets to the top (top dead centre) as it literally gives the spark a chance to get the fuel burning, to make the bang that drives the piston down the bore.
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Whether you believe you can, or you cannot, you're probably right.
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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Is my Car "Pinking"?slater
@slater
Club Retro Rides Member 78
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If you have a modern timing light it will have a rpm readout on it..
Really it's not nessicary to check it with a timing light tho. The figure they give you in the book may not be correct in the first place. As i mentioned before, presumably this car was designed for leaded fuel? If you now running it on 95ron unleaded.. (and no it makes no difference which brand. 95ron is 95ron) it may pink.
It's easy to solve the issue. Simply remove the dizzy cap and turn the engine over on the starter. Note which way the rotor arm goes. Mark the original position for the dizzy, then slacken it off and twist in the same direction as the rotor arm by a small amount. As small as you can really. Then nip it up and test the car. Pinking gone? JOB DONE pinking still there? then repeat. You won't hurt anything retarding the ignition. It will simply get to a point where it won't run or start proeprly and will feel sluggish. If all goes wrong simply put it back where you started and look for another cause.
You could use an octane booster or simply use a 'super unleaded' but it's not really nessicary. Why pay over the odds for fuel and additives for the sake of 5mins work.
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Jan 24, 2019 10:07:49 GMT
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I agree. I remember at the time we changed to unleaded my astra pinked a lot, a simple manual retard of the ignition by turning the distributor solved it.
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