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[Kevin Wood]

im sorry, but thats horsesh*te, revving the other car will make no difference

what volts do cars with alternators run at? do your lights get brighter when you rev the engine at night??

the alternator puts out 13.4v ot there abouts no matter what the revs are

what you needed was more time not more revs

thats not opinion thats a fact.

muchlove

You'll soon be stranded with only 13.4 Volts from your alternator, I'm afraid.

14.4. is more like it.

Whilst the regulator built into the alternator will probably target 14.4 Volts all the time (some smarter designs adjust the voltage intelligently), the amount of current that the alternator can deliver depends on the speed at which it is rotating. Due to the wide speed range over which they must operate, they won't deliver their full rated output current until the engine is rotating at significantly over idle speed.

So, speed won't affect regulated output voltage directly, but if the alternator is heavily loaded (by a flat battery, for example) the Voltage may well drop below this unless you lift the revs, hence it is good advice to do so in this scenario.

Oh, and if you disagree with someone, feel free to do so respectfully.

[zirk]

the advice given was to rev it to 4-5k, thats the horsesh*te

yes a totally flat battery may need 2k if youre in a rush, but revvig to 4/5k? WASTE OF PETROL

also leaving it at tickover would recitfy the problem yes?

Again with a totally flat battery, probably not, leaving it at tickover for a while will probably just keep kicking in the cooling fans and disrupt any charge to the battery, takes a long time to get a fully flat Battery back up to full charge mode, Id rather take it for a good spin or whip the battery off and charge it rather than leave just ticking over.

[Webby the Bear]

Interesting read on the comments.

Well car is still idling rough. The sound of it sounds more tractor like at idle when I look under the bonnet. I'm wondering if I've accidentally caused a misfire. I made sure for absolute definite that I got the leads hooked up correctly. when I put some revs on it sounds a lot better... although there seems to be no loss of power, temp gauge bang on at 90. just the bag of spanners sound 

Wondering if a TechII live data read would reveal anything?

Any advice welcome.

[zirk]

Interesting read on the comments.

Well car is still idling rough. The sound of it sounds more tractor like at idle when I look under the bonnet. I'm wondering if I've accidentally caused a misfire. I made sure for absolute definite that I got the leads hooked up correctly. when I put some revs on it sounds a lot better... although there seems to be no loss of power, temp gauge bang on at 90. just the bag of spanners sound 

Wondering if a TechII live data read would reveal anything?

Any advice welcome.

Probably, but as for your original post topic and others to come, I reckon you invest in a half decent DVM.

[Webby the Bear]

Interesting read on the comments.

Well car is still idling rough. The sound of it sounds more tractor like at idle when I look under the bonnet. I'm wondering if I've accidentally caused a misfire. I made sure for absolute definite that I got the leads hooked up correctly. when I put some revs on it sounds a lot better... although there seems to be no loss of power, temp gauge bang on at 90. just the bag of spanners sound 

Wondering if a TechII live data read would reveal anything?

Any advice welcome.

Probably, but as for your original post topic and others to come, I reckon you invest in a half decent DVM.

Is on my list mate... sadly the money I've had to drop to go to mechanic school means i'm very, very.............very, very, very poor 

[zirk]

Interesting read on the comments.

Well car is still idling rough. The sound of it sounds more tractor like at idle when I look under the bonnet. I'm wondering if I've accidentally caused a misfire. I made sure for absolute definite that I got the leads hooked up correctly. when I put some revs on it sounds a lot better... although there seems to be no loss of power, temp gauge bang on at 90. just the bag of spanners sound 

Wondering if a TechII live data read would reveal anything?

Any advice welcome.

Probably, but as for your original post topic and others to come, I reckon you invest in a half decent DVM.

Is on my list mate... sadly the money I've had to drop to go to mechanic school means i'm very, very.............very, very, very poor 

I fully understand that webby, but it will be a good investment, nothing fancy, Ive allways rated Flukes myself, even an old second hand Fluke 77 or simular of the Bay would be a good starting tool 

[Webby the Bear]

Interesting read on the comments.

Well car is still idling rough. The sound of it sounds more tractor like at idle when I look under the bonnet. I'm wondering if I've accidentally caused a misfire. I made sure for absolute definite that I got the leads hooked up correctly. when I put some revs on it sounds a lot better... although there seems to be no loss of power, temp gauge bang on at 90. just the bag of spanners sound 

Wondering if a TechII live data read would reveal anything?

Any advice welcome.

Probably, but as for your original post topic and others to come, I reckon you invest in a half decent DVM.

Is on my list mate... sadly the money I've had to drop to go to mechanic school means i'm very, very.............very, very, very poor 

I fully understand that webby, but it will be a good investment, nothing fancy, Ive allways rated Flukes myself, even an old second hand Fluke 77 or simular of the Bay would be a good starting tool 

I'll check them out. Thanks Zirk 

[tidla]

Cut out the bigmac meal and you have enough.

http://www.ebay.co.uk/itm/DIGITAL-MULTIMETER-VOLTMETER-AMMETER-VOLT-OHM-METER-VOLTAGE-TESTER-TOP-Quality-/171020624002?pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash=item27d19fa082

It will do for now or longer.

[Webby the Bear]

Cut out the bigmac meal and you have enough.

http://www.ebay.co.uk/itm/DIGITAL-MULTIMETER-VOLTMETER-AMMETER-VOLT-OHM-METER-VOLTAGE-TESTER-TOP-Quality-/171020624002?pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash=item27d19fa082

It will do for now or longer.

Why so cheap? 

[Entwood]

Cut out the bigmac meal and you have enough.

http://www.ebay.co.uk/itm/DIGITAL-MULTIMETER-VOLTMETER-AMMETER-VOLT-OHM-METER-VOLTAGE-TESTER-TOP-Quality-/171020624002?pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash=item27d19fa082

It will do for now or longer.

Why so cheap? 

Basic but functional

Have one of these in the front draw of the tin tent, useful for the odd circuit check/resistance check etc .. no great shakes but they work, and if they get stood on .. buy another !!

I have a more accurate, more sophisticated digital one at home, used for accurate measurements and work on computer stuff, but it not needed for basic car type checks.

[Webby the Bear]

Cut out the bigmac meal and you have enough.

http://www.ebay.co.uk/itm/DIGITAL-MULTIMETER-VOLTMETER-AMMETER-VOLT-OHM-METER-VOLTAGE-TESTER-TOP-Quality-/171020624002?pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash=item27d19fa082

It will do for now or longer.

Why so cheap? 

Basic but functional

Have one of these in the front draw of the tin tent, useful for the odd circuit check/resistance check etc .. no great shakes but they work, and if they get stood on .. buy another !!

I have a more accurate, more sophisticated digital one at home, used for accurate measurements and work on computer stuff, but it not needed for basic car type checks.

Thanks Entwood..... just ordered. Can't grumble at that price!!! 

[zirk]

Cut out the bigmac meal and you have enough.

http://www.ebay.co.uk/itm/DIGITAL-MULTIMETER-VOLTMETER-AMMETER-VOLT-OHM-METER-VOLTAGE-TESTER-TOP-Quality-/171020624002?pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash=item27d19fa082

It will do for now or longer.

I saw them in the Pound Shop.... ended up getting some Wagon Wheels instead, Yum! 

[the alarming man]

was going to say look here for good reliable meters...mine as bounced many a time from the top of a ladder


http://www.batterytester.co.uk/Multimeters-Accessories-and-Clamp.php

[Webby the Bear]

Thanks for the info guys  I'll use the one I've ordered and see what it enables me to do 

On an aside, am I right in thinking that if I have a misfire my 2.5 V6 wont throw up a check engine light, correct? If that's correct then will it show on a live data read on a TechII sesh? 

[TheBoy]

Cheapo meter will suffice. No need to buy expensive Flukes etc, as you're not interested in calibration and accuracy.