boost problems

Since buying my car it has boosted at 1.2 but last weekend after not driving it for a week i noticed its boost is all over the place on the a19 on the way home from nbo i put my foot down. The boost shot up to 0.92 then went to 1 bar back down to .95 then .98 etc etc can anyone advise on this matter?

Could well be spark plugs. If it was left idling before you switched it off the time before you left it for a week, the plugs could have been a bit wet when you turned it off. That would be enough to damage the electrode.

chris@eclipse wrote:

Could well be spark plugs. If it was left idling before you switched it off the time before you left it for a week, the plugs could have been a bit wet when you turned it off. That would be enough to damage the electrode.

Correct me if im wrong but wouldnt dodgie plugs cause the car to run very poor? The car actually doesnt feel any different under normal driving just when i put my foot down, it has no hesitation no lumpy idling or anything.

Plugs can be fine under normal driving and give problems under load even more so on turbo cars as it's much harder for the spark to jump the gap in a cylinder full of boost pressure.

well think its time for a plug change, wish id done this when i had the engine out tho

Like Dave said, when your just plodding around your not asking much from your plugs, so if they're only slightly damaged you wouldnt notice. But under full load, if they're not sparking at 100% the air pressure will blow the spark out, hence the hesitation & low boost.

Id say Im 98% sure its plugs!

price on plugs then chris?

NGK PFR6B's £9 each, PFR7B's £11 each

£30 to fit them if you cant be bothered!

get in touch with drew mate sure he has some 7bs in stock a bit cheaper

chris@eclipse wrote:

NGK PFR6B's £9 each, PFR7B's £11 each

£30 to fit them if you cant be bothered!

Whats the difference between 6b's and 7's

different temps think the 7s are cooler running i could be wrong though

yip keep plenty of the pfr6's and pfr7's in stock at £35/set had them at this price for ages

also keep the IFLR7H upgraded 2.5 hawkeye ones as well

Yeah, your right Mick. You need to step up to 7's when running a moderately modified car with high boost.

The plug gap is also crucial depending on your modofications

Warwick, Not be a coil pack off/cracked ?. We can have a look this weekend when you come over. Plugs arnt that bad TBH.

Right lads on the way to work last night i put my foot down for a fair while and the car started to boost properly all the way down to the shell garage at easington, after filling up i set off again to find the car not boosting properly again.

mark that sounds good m8 see you this weekend

Nee worries, think i have a few old coil packs in the garage to try, i'll have a look this afternoon. How long since the plugs were done like ?.

dont know m8 ill have to check sevice history i havnt changed them since i have had the car

just had a look, can't find the set i had as spares off the old car, maybe tossed them out, possibly ask drew if he has one or two in case one of yours have cracked. I'd change the plugs yo've had the car 2 year or there abouts. tight arse.
Let me know if you want out collecting from Drews as i'm poping over there on sat.

Warwick ive got a set of plugs hete from mine there fine plug 3 single coils whats good you can try befor shelling out if u want just givs a text

checked the service history and the last time the plugs were changed was 2/3/2007.

Lol due a change then . The ones i have are the 7s and ill see you tomorrow with them

Thanks to mark (maxboost) for changing the plugs, at first the car seemed better round the streets but upon my journey to work the boost problem is still occuring.

Does anyone else know of anything to try before i burn it?

If your passing here pop it in if you like and we'll have a look for you. Its hard to say without driving it what it might be.

Air and fuel filters lol it caused me major boost problems lol it was the most unlikly thing but it worked and for 15 pund why not mate.

Bummer bud, deffo thought the hole in the intercooler pipe on the cold side was the issue. Did you try another BOV' like i sugetsed as it could be leaking under pressure. Did the error codes you cleared come back ?. If not you have a few things to investigate before getting the matches out.