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James Mongan
P Plater
78 Posts
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 Posted - 18 Aug 2006 : 3:27:59 PM
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last week i put in a HSV Sv3800 Memcal into my computer and now for some unknown reason it has a miss when acelerating when engine is cold, fine when warm not there at all but at cold it's quite noticeable, when i put it in i did all the usual disconnect the battery n' 3thou 4 20sec.
any ideas will be appreciated.
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trizo
Forum Moderator
3091 Posts
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Posted - 19 Aug 2006 : 02:01:39 AM
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| mate I don't mean 2 sound rude but if u want 2 read how2 reset ur comp the right way read mouce's post on throttle body's in the members how 2 section,this is new if u hadn't noticed!anywho chek it out mate it will help u!!@ |
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Brum
P Plater
65 Posts
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Posted - 20 Aug 2006 : 7:19:22 PM
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| @ Trizo. Where is this new members section of how to? I wouldn't mind knowin how to 'properly' reset my ecu. Cheers |
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mouce
National Driver
1525 Posts
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Posted - 21 Aug 2006 : 11:03:13 AM
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In the left hand frame of this page (and any on VNCommodore.com) click on 'forums', there is the "General Area" and there is a "Members Only Area". As part of the members only area there is a how-to section.
Check it out.
As for the mysterious miss when under load and it's cold. The problem may not be with the memcal. Check out your leads/plugs/coil packs. While it's true that they more often than not pack up when they are hot, they can also cause problems when cold. If there is a loose connection it's quite possible that when it's cold it's not behaving itself, but when it heats up a bit it expands and 'joins' properly. |
Bite off more than you can chew, and chew like hell - Peter Brock (1945-2006) |
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trizo
Forum Moderator
3091 Posts
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Posted - 21 Aug 2006 : 7:37:19 PM
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| with these chip upgrade wat else do u haf to do?Do they slot straight in?Were do they slot into?besides power wat other advantages does it haf? |
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mouce
National Driver
1525 Posts
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Posted - 21 Aug 2006 : 11:35:32 PM
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Depends on the chip that you're putting in. If you have made it yourself (and it's not THAT hard to do if you can use a computer, and do some simple calculations) then you can get it to do pretty much whatever you want in terms of power (within reason), keep in mind though that you can quite easily program a chip that will give you tonnes of power, and use about twice as much fuel :(
It's also possible to set up the system so that you can run multiple chips, eg: a 'power' chip, the standard chip, and a 'cruising' chip.
The power chip would use the most fuel, but produce the most power, useful for dealing with rice-burners and V8's
The standard chip is what's in there and would be run most of the time,
The 'cruising' chip would use the least amount of fuel possible to keep the car at 100kph or 110kph. It would really reduce the amount of power available for accelerating, but out on the open road, it would reduce the fuel usage wonderfully.
The chip itself replaces the memcal that is part of the ecu, which is tucked under the left hand side kick panel in the passengers footwell. To get at it you may have to take out your glovebox (can't remember off the top of my head), and then you can remove the kick panel. Going on what I can remember of it when I had my ecu out last, you'd need to be fairly good with a soldering iron to be able to change it over. What is commonly done is that a EPROM holder is soldered in place of the existing memcal and the memcal then just gets slotted back into that this makes it easier to change chips in the future if you want to, and it also reduces any chance of there being any heat damage to the EPROM.
Over the counter chips are available, but the only way that you'll get the best possible tune for your car is to either get it professionally dyno tuned and have the 'experts' create the ideal chip for your car, or for you to buy the parts (total of less than $100), and spend about 3 days reading up on the theory of how to do it, then get infront of your computer, and start making chips, it's a trial-and-error process. You'll get there in the end, and if you're careful it will be just as good as the dyno tuned one, it will just take a bit longer.
I think I might put a how-to together on this, so stay tuned for it, by the end of the week hopefully. |
Bite off more than you can chew, and chew like hell - Peter Brock (1945-2006) |
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trizo
Forum Moderator
3091 Posts
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Posted - 22 Aug 2006 : 7:32:33 PM
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hey mouce che mate that was helpful, as I've said b4 the performance side of things is a bit of a puzzle ie. mod chips ect the how 2 would be great..as 4 making your own u will haf to xplain alittle more in the how 2 as makin stuff trial and errors ways is right up my ally!can't wait should be good...
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