Archive for The Motor Forum talking cars since 2006          The Motor Forum Forum Index -> Your Cars DradusContact Coil Packs I think my car is missfiring.  I am genereally of the opinion that if i am replacing a part i will replace it with an uprated version so hopefully it wont go again.  Im going to get some good leads, like 8.5mm ones seem to be the best i can fit. The other link in the chain that could be causing it is the coil pack.  Looking online there seems to be precious little info on them, and i cant find anywhere apart from pumaspeed that sells them.  The one they sell is an "MSD Hyperpower Blaster Coil" for about £80 but i want other options? Tinklers, can you assist? "him" http://www.gendan.co.uk/product_CP1007.html I couldn't (knowingly) have anything on my car named "MSD Hyperpower Blaster Coil", it will either work or it won't so I doubt it will give any performance gains, and you can get 2 of the ones above for the same cash! Or from "the bay" http://cgi.ebay.co.uk/coil-pack-i...temQQssPageNameZRSS:B:SRCH:UK:101 DradusContact So you dont think there is any sort of gain to be had from fitted a better one?  No better voltage or something? "him" I am no expert on such matters, Phillip is better qualified to comment, but my 2p is that the gains from such things on a (relatively) standard engine are next to nil. Unless you are running a turbo or a heavily modified engine that demands more from the ignition system, you will normally be fine with OEM spec. DradusContact What about ignition leads?  Current boggo ones are 7mm, they do 8mm, 8.5mm 9mm and 10mm, 10 are apparently for race spec engines. Blarno If it does give you any gains, it'll be imperceptible. Same with the leads. Chances are it'll have a placebo effect and you'll think the car is quicker when it isn't. Save your cash and wang in a standard coilpack. And, if you do change the coilpack, it's good practice to do the leads and the plugs at the same time. TimR Are you sure its a coilpack causing the problem? How old/what mileage is on theplugs themselves? DradusContact I dont know what the problem is to be honest.  The car is spluttering intermittantly at low revs.  You can floor it and thhere will be nothing for about 2 or 3 seconds beofre it will pick up and pull. The plugs were fitted in november last year. Everyone seems to be suggesting a missfire, since the plugs are decent its more likely the coil pack or leads. TimR I'd take the plugs out and check their condition first before spending a load of money on other stuff. DradusContact Well, whats a typical lifetime on the leads? mine will be 10 years old in janurary so i dont mind paying a bit for new ones Blarno DradusContact wrote: I dont know what the problem is to be honest.  The car is spluttering intermittantly at low revs.  You can floor it and thhere will be nothing for about 2 or 3 seconds beofre it will pick up and pull. The plugs were fitted in november last year. Everyone seems to be suggesting a missfire, since the plugs are decent its more likely the coil pack or leads. I'd say coilpack. Mark Before you start throwing money at a coil pack, you should make sure there isn't a blockage in the fuel system, that your MAF is clean and no split pipes taking in air etc. If it persists, buy a standard coil, too - I really can't see what an 'uprated' one will (or could) do that a standard one doesn't. DradusContact Ok so in summary im going to get a standard coil pack, and the better rated leads and some good spark plugs. Blarno Don't waste your money on uprated leads, you won't notice any difference. Been there, done it. DradusContact But the thingy says theyre better!  Better spark surely equals better power? Blarno You, as a normal human being, won't be able to notice the difference. It may well create a better spark, but it's a minor difference. If they're that good, why aren't they standard fit and why does almost every performance car available have 'upgraded' leads available? DradusContact Cos, errrr, hmmmm, theyre stuoopid? Mark Blarno wrote: If they're that good, why aren't they standard fit and why does almost every performance car available have 'upgraded' leads available? 180 Blarno Quite. And the gain would be minimal, 5 bhp at best, and you'd struggle to notice that. It may run a bit smoother, but the power increase for the price you pay is worthless. Power costs money, proper money. An electric turbo off Ebay would have more effect! "him" Blarno wrote: An electric turbo off Ebay would have more effect! Excellent, I am bidding on one at the moment...   [joking] Blarno DradusContact wrote: Cos, errrr, hmmmm, theyre stuoopid? Nup, because people will shell out money for anything. TimR I've got special car mats in the M5. They give me a guaranteed increase of 57.6 BHP. But only if I hoover stripes across them. If the stripes are longitudinal I only get 3.2984 BHP more Boxer6 TimR wrote: I've got special car mats in the M5. They give me a guaranteed increase of 57.6 BHP. But only if I hoover stripes across them. If the stripes are longitudinal I only get 3.2984 BHP more Well, that's because of the added wind resistance, innit?!?! You need Piers, you do!   TimR I'm a happily married man thankyou GonnaBreakABuggy "him" wrote: I am no expert on such matters, Phillip is better qualified to comment, but my 2p is that the gains from such things on a (relatively) standard engine are next to nil. Unless you are running a turbo or a heavily modified engine that demands more from the ignition system, you will normally be fine with OEM spec. Bingo, the only time I'd recommend an ignition upgrade is if you are running nitrous, a huge turbo, or any rotary engine ('cause the plugs are always wet as the rotors fling fuel and oil at 'em). To be honest, most of the aftermarket 'uprated' bits aren't as well made as the OEM stuff anyway. DradusContact This was what i was going off with regards to the leads: "8.5mm KV85 Competition Cable Primarily designed for racing engines using racing ignitions, turbocharging and supercharging. Entire jacket made from aerospace extreme heat-resistant silicone rubber. Exclusive Magnecor 2.5mm Metallic Inductance Suppressed Conductor will suppress EMI indefinitely, allowing this cable to be used on road vehicles with any ignition. Can be fitted into most original lead holders." Though thats from a website that sells them so i admit there will be some bias. And i can inform you lot that i do understand you have to pay money for power, ive never purchased a £3.99 superchip from ebay yet. Frank Bullitt Re: Coil Packs DradusContact wrote: I think my car is missfiring.  I am genereally of the opinion that if i am replacing a part i will replace it with an uprated version so hopefully it wont go again.  Im going to get some good leads, like 8.5mm ones seem to be the best i can fit. The other link in the chain that could be causing it is the coil pack.  Looking online there seems to be precious little info on them, and i cant find anywhere apart from pumaspeed that sells them.  The one they sell is an "MSD Hyperpower Blaster Coil" for about £80 but i want other options? Tinklers, can you assist? Could be that a Frenchman put the electrics together...   DradusContact Bottled it and ordered OEM coil pack and boggo bosch leads and plugs, £70 for the lot on ebay. "him" Good man! I hope it sorts the problem for you... Blarno DradusContact wrote: This was what i was going off with regards to the leads: "8.5mm KV85 Competition Cable Primarily designed for racing engines using racing ignitions, turbocharging and supercharging. Entire jacket made from aerospace extreme heat-resistant silicone rubber. Exclusive Magnecor 2.5mm Metallic Inductance Suppressed Conductor will suppress EMI indefinitely, allowing this cable to be used on road vehicles with any ignition. Can be fitted into most original lead holders." There's the moot point. DradusContact Fitted new (OE) coilpack at the weekend and has not solved problemo.  I got some used 8.5mm KV85 Competition Cables (used, but they have a lifetime guarantee) too for £25.  So pretty sure its not the ingition/spark system. Mark Mark wrote: Before you start throwing money at a coil pack, you should make sure there isn't a blockage in the fuel system, that your MAF is clean and no split pipes taking in air etc. If it persists, buy a standard coil, too - I really can't see what an 'uprated' one will (or could) do that a standard one doesn't. Once more... DradusContact Mark wrote: Mark wrote: Before you start throwing money at a coil pack, you should make sure there isn't a blockage in the fuel system, that your MAF is clean and no split pipes taking in air etc. If it persists, buy a standard coil, too - I really can't see what an 'uprated' one will (or could) do that a standard one doesn't. Once more... All those things sound complicated and expensive though Roadsterstu DradusContact wrote: This was what i was going off with regards to the leads: "8.5mm KV85 Competition Cable Primarily designed for racing engines using racing ignitions, turbocharging and supercharging. Entire jacket made from aerospace extreme heat-resistant silicone rubber. Exclusive Magnecor 2.5mm Metallic Inductance Suppressed Conductor will suppress EMI indefinitely, allowing this cable to be used on road vehicles with any ignition. Can be fitted into most original lead holders." Though thats from a website that sells them so i admit there will be some bias. And i can inform you lot that i do understand you have to pay money for power, ive never purchased a £3.99 superchip from ebay yet. I used KV85 leads on 3 of the 4 MX-5's.  Along with a decent quality plug it did run smoother.  It could be your coilpack, but if you replace the 'pack, leads and plugs, without going overboard on anything daft or anything with silly claims, you really should feel the car runs smoother.  As for more power?  I'd agree with others - you'd never notice. DradusContact Annoying the hell out me now.  does it every time the car is started, one and only once, about 2-5 minutes into driving, the first time you really ask anything from the engine.  Lack of power for a few seconds then picks up. Blarno Maybe some sort of sensor, or as Mark suggests, a fuel problem. Get some Redex or Lucas fuel treatment. It's only about 6 quid and can work wonders. I put some of the Lucas gear in my Legacy after it had sat for a year and it ran like a dream. DradusContact There are horror stories a-plenty of what happens you put reddex into the nikasil lined 1.7 engine though. Blarno Use the Lucas stuff, then. If it's good enough for Top Fuel dragsters, it's more than good enough for a Fiesta in a dress! DradusContact Blarno wrote: Use the Lucas stuff, then. If it's good enough for Top Fuel dragsters, it's more than good enough for a Fiesta in a dress! I like to think of it as a fiesta in racing overalls          The Motor Forum Forum Index -> Your Cars Page 1 of 1