Thread: V8i Idling Issue

Originally Posted by eddie_V8i

i forgot to mention, it is backfiring alot too, even before i adusted the timing

In that case I doubt it is fuel.
I guess you have not changed the spark plugs?

Those things can be totally useless and still look serviceable.

If it were mine, I'd change the plugs and have a really good look at the rest of the ignition system, as the coil could also be faulty.

I have struck this problem before in Ford V8's and two stroke motor bikes.

If it were mine, new plugs, new coil and if the problem is still there, run it at night with the bonnet up, put it under load and look for sparks from the plug leads.

Originally Posted by eddie_V8i

hey there guys, i was just speaking with alto land rover on the phone again, they are fairly certain that it sounds like stickly valves.

is this easy to repair? i realise that i would have to take the heads off, and strip the valves and springs off to de coke all of the carbon off, but would that be all i need to do?

They would
If it were true you would hear a hell of a lot of "clacking" from the lifters.

yeah, im yet to replace the leads and plugs, i do know however it (at one stage today was running perfect) there is plenty of spark

im just wondering if can a faulty maf cause an eratic behaviour (***AND when you hold the throttle at a patricular position the revs just drop away)

Have you tried unplugging the MAF while it's running badly to see if anything changes? Ditto for TPS. The engine will run (badly) on either without the other. If the problem changes when you unplug and then plug back in, then at least you know that component is doing something... If nothing changes it indicates that it may be cactus.

Also, try twisting the MAF pins SLIGHTLY and carefully, cleaning the connectors and plug the connector back in ensuring none of the pins back-out. Just doing this fixed similar symptoms in mine. Been faultless ever since

Also, if you want to clean the MAF with carby cleaner ensure that you spray into the little hole next to the offset venturi inside. It's that port that does the "sensing" and it need s a good blast to clean it out, preferably whilst giving it a rev. Just spraying generally into the MAF will do bugger all.

Good luck.

yeah disconnecting it actually seems to make it run better, as strange as it sounds.. i didnt disconnect the tps, because it seemed to be running right, my mate is a wizz with electronics etc and efi cars, so he was saying that it was working fine. Unfortunately the car is at my gf's property 2 hours from my place so i'll have to wait till i head out that way again before i can investigate some more.

I just bought a brand new Air Mass Flow Meter (5AM MAF like mine) on ebay from the UK for $133.10 (postage is 1included in that price) so lets hope that after that, and a set of new leads and plugs etc, i can start to enjoy the disco rather than scratching my head as to why its running like a demented dog with three legs

lol

ps, is $133.10 a good price for a brand new 5AM MAF meter?

$133 sounds like a dead-set bargain to me. I'd expect closer to GBP133... or even more. Is it a genuine Lucas item? Where'd you get it from?

it was actually GBP$46 (AU$99.62 approx) plus GBP$16 postage, total GPB$62

i think there is one left

ebay item 230232199983 i got it through "goldstar international" which i think has been renamed as GOLDSTAR.DBD34 an ebay store i found

Originally Posted by eddie_V8i

yeah, im yet to replace the leads and plugs, i do know however it (at one stage today was running perfect) there is plenty of spark

im just wondering if can a faulty maf cause an eratic behaviour (***AND when you hold the throttle at a patricular position the revs just drop away)

Well, replace the plugs today.
If it fixes the problem, you have saved a lot of money.
If not, did deeper.

Generally, I start at the combustion chamber and work back.
Obviously others will disagree, but it is the cheapest and easiest way.