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hsv_babe
Fully Licenced
269 Posts
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 Posted - 17 Dec 2009 : 09:04:53 AM
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Hey guys im thinking i might know whats wrong with the new vn with starting it, just gave it a full service leads were f*&ked spark plugs were cracked so changed everything filters the works, thought that might fix the problem but come time to start it again it is still doing what it was doing before, so im thinking possibly the coil pack. what normally happens when these are on they're way out, not fussed if it is that cos i still have the one off the old vn. any ideas or suggestions of what to check would be great
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I'd gladly push my holden than drive a bloody ford! |
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VN91SX
Fully Licenced
344 Posts
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Posted - 17 Dec 2009 : 8:21:20 PM
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Any spark, lead, or coil problem will cause the car to miss-fire when it is running, especially once the car has warmed up to it's running temperature. Sounds like you are living up to you avatar atleast, because you must be doing alot of pushing of your Holden at the moment :)
Best of luck though in getting it running |
Edited by - VN91SX on 17 Dec 2009 8:23:00 PM |
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Mechknight73
National Driver
1001 Posts
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Posted - 17 Dec 2009 : 10:45:13 PM
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| If something was on the way out on the ignition, it would misfire, usually in a rhythm. I would replace it one component at a time to find out exactly which part is the culprit. You've done the plugs and leads, was the other one running ok before you pulled it down? If you have an engine where you know everything worked fine, it's a good starting point. |
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hsv_babe
Fully Licenced
269 Posts
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Posted - 18 Dec 2009 : 10:46:57 AM
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| it's not missing at all once its started i put my other coil pack in it yesterday and its still doing it so now im thinking its not spark, its not air, so its gotta be fuel maybe??? prehaps a new fuel filter? |
I'd gladly push my holden than drive a bloody ford! |
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Mechknight73
National Driver
1001 Posts
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Posted - 18 Dec 2009 : 8:11:56 PM
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| The fuel filter is a cheap part to replace, so do it anyway. If it still keeps playing up after you change it, check everything you can about the rest of the fuel system. There's a filter in the tank, but it's not as fine as the one on the fuel line. Just in case you don't know, the inline fuel filter may be under pressure, even with the ignition off, so aim at something that it doesn't matter if it's sprayed with unleaded. |
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Mechknight73
National Driver
1001 Posts
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Posted - 18 Dec 2009 : 8:14:24 PM
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| Another one I forgot to ask, how's your fuel pump? Bench it and check to make sure it's pumping properly |
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hsv_babe
Fully Licenced
269 Posts
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Posted - 19 Dec 2009 : 09:54:17 AM
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| Fuel pump is working fine, gave the car a little bit of **** coming home from the car wash the other night and it didnt feather or anything so yeah i think thats working ok |
I'd gladly push my holden than drive a bloody ford! |
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Mechknight73
National Driver
1001 Posts
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Posted - 19 Dec 2009 : 10:56:10 AM
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| Just try this, and see if it makes ANY difference at all. Turn the ignition on, and let the fuel pump go until it stops pumping, then crank the motor, just to see what it does. If there was a leak, the fuel pump would keep going. If not, it should stop when it reaches maximum capacity. Kind of like an electric "float valve" |
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hsv_babe
Fully Licenced
269 Posts
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Posted - 20 Dec 2009 : 3:10:05 PM
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| Just tried it the fuel pump did turn off after the normal time then i tried to start it and it still carried on |
I'd gladly push my holden than drive a bloody ford! |
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Mechknight73
National Driver
1001 Posts
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Posted - 20 Dec 2009 : 10:20:10 PM
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| This is where my knowledge of the Buick V6 gets murky. If the engine idles and runs normally once started, then something in the start sequence is going funny. "Misfiring" can sometimes be mistaken for a vacuum leak, and this is on any EFI engine, not just the V6. They're very sensitive to vacuum leaks, more so than a carby engine. If one of those vacuum leads, no matter what it does on the car has a leak, it will make an engine run rough. Obviously, when the engine is cold, the leak is x size. On a rubber vacuum hose, when the engine is warm, it could be x size bigger or smaller, depending on where it is and what type of hose. With vacuum leads, sometimes they will make the engine "misfire" at random intervals. |
Edited by - Mechknight73 on 20 Dec 2009 10:21:43 PM |
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hsv_babe
Fully Licenced
269 Posts
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Posted - 21 Dec 2009 : 12:41:41 PM
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| its not misfiring |
I'd gladly push my holden than drive a bloody ford! |
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Mechknight73
National Driver
1001 Posts
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Posted - 21 Dec 2009 : 5:47:47 PM
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| I mean how an engine with a vacuum leak "coughs" and some people would call that a misfire |
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hsv_babe
Fully Licenced
269 Posts
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Posted - 21 Dec 2009 : 10:18:51 PM
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| yeah its not really doing that either when you turn the key you've gotta pump the pedal to get it to completely turn over then it carries on for about i dunno 5 to 10 seconds then its fine, i dunno its weird, gonna try change the filter tomorrow and see what happens will let you's no how it goes |
I'd gladly push my holden than drive a bloody ford! |
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Mechknight73
National Driver
1001 Posts
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Posted - 21 Dec 2009 : 10:53:10 PM
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| I once remember a VR that wouldn't start at all unless you had your foot on the accelerator. Carby engines usually start that way, but injected engines don't normally need that. This car had been neglectyed a lot, and I suspect the entire fuel system, from the pump to the injectors was clogged. Probably won't hurt to give it a shot of injector cleaner as well. But you can only go through an elimination process one by one. Still, all this maintenance is good for a car anyway. |
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hsv_babe
Fully Licenced
269 Posts
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Posted - 22 Dec 2009 : 08:54:12 AM
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| yeah i was thinking about putting that stuff in when i fill it up |
I'd gladly push my holden than drive a bloody ford! |
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Mechknight73
National Driver
1001 Posts
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Posted - 22 Dec 2009 : 11:24:02 PM
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| Depending on which one, I can say inejctor cleaner does work. Then again, so does a shot of Avgas. If you have any mates whom work on planes, or know anyone who owns an aircraft that can use Avgas, get the unleaded variety, and it's better than putting 98 octane in if you mix it with normal unleaded. To cut a long story short, I was given 100 litres of the stuff, which I used over 5 tanks of fuel. The 186 powered one tonner I was using it in thought I was feeding it methanol. No burnt valves or piston tops, but a cleaner fuel system. It used to be the "backyard injector cleaner;" put 5 litres of Avgas in with a full tank of fuel. |
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bigjohn256
P Plater
19 Posts
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Posted - 12 May 2010 : 09:42:05 AM
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maybe low in compression it would create troubles starting but when running wouldnt be an issue
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F.O.R.D, Ford Owners Return In Datsun. . . . couldnt be more right |
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hsv_babe
Fully Licenced
269 Posts
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Posted - 13 May 2010 : 8:03:08 PM
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| It's the starter motor buddy |
I'd gladly push my holden than drive a bloody ford! |
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