Hmm T Won't Accelerate

[gilto]

Hi guys well my T is a little sick...over the past week it has been reluctant to accelerate under load.

This is only under hard acceleration and it seems as though the ecu wants to pull the power as soon as boost comes on...

Well this morning it did it and it went "POP". Opened the bonnet and the hose going to the crossover had come off. No problem just put it back on and tightened the clamp...didn't drive hard though...

Then this afternoon every time it comes on boost under hard aceleration it backfires about 3000rpm with no mumbo and I back off straight away....

Under 2300rpm its no problem, idles perfectly and drives normal. Even accelerating slowly it is fine...it's only under WOT ther power is hugely dulled and then backfires...

As I am mechanically very challenged I am asking you guys....

My guess is spark plugs????? But I really don't have a clue....haha

Thanks in advance......

[senna_T]

check all other hoses and clamps, and also check the lines going to the actuator, almost sounds like its hitting boost cut, but I'm no mechanic either mate! good luck, you've had a few niggles with your car dude

[Fat-Tony]

I would be placing my bets that your fuel pump has sh*t a brick.

[gilto]

I would be placing my bets that your fuel pump has sh*t a brick.

Hmm that could be very possible because when it was tuned last week we had to stop at 300RWKW and the afr's were all overe the place because we couldn't get enough fuel to the engine...I've got siemens dekas so it's not the squirters....

We thought it was fuel pump....I am getting the process west surge tank with bosch 044 so will I ALSO have to replace my standard pump do you think????

I actually have a brand new standard pump...can anyone in Sydney do the swap or is it fairly simple....

Cash or beers are available for installers......

Edited 29/10/07 07:18 AM by gilto

[Fat-Tony]

Yes you will have to replace the standard pump if running the process west surge tank as it feeds the tank, and you are right the dekas have a lot more fuel left in them when making 300rwkw.

I would be getting the car back to get the AFR's checked out as when the fuel pump is gone its not uncommon to see them as lean as 16:1, if it is indeed the fuel pump get it changed out ASAP.

[stealthxr]

I reckon your plugs have fouled, going by your first post you blew a pipe off, that will foul your plugs pretty quick if you keep driving it, which sounds like you did..

Been there done that ...... type of thing for me..

pete

Edited 29/10/07 07:35 AM by stealthxr

[gilto]

Thanks fatsex....are you in Sydney?? Can you help me out with an install.....

It couldn't be spark plugs????

[Fat-Tony]

I can help with an install but I am in melbourne. What Pete is saying makes sense because it came off at your cross over and your map sensor is before this point, meaning your car will run really rich if driven around like that. I would be checking out the plugs first and it all is well there then trouble shoot the fuel pump.

[gilto]

Thanks fatsex and Pete,

I'll take a look at the spark plugs tomorrow and let you know how it goes......

[gilto]

90% fixed...

Pete and fatsex you were right! I replaced the spark plugs....when I took them out they were pretty black around the base so they have been running rich....

I had NGK's in my garage so I just used them.....

Took it for a test drive with TC off....acceleration through first gear was perfect and spun the tyres...into second and high in the rev range it was a little hesitant to go....

kept driving.....5 minutes later from a standstill 1st gear again was faultless....second gear accelerated hard with a bit of reluctancy and then did a BIG backfire.......

from standstill again and first was fine again.....just is hesitant at high RPM in 2nd ???? Could this be plug gap?????

The NGK's were 0.8 and I reduced them to 0.6 however I did it with a hammer and I'm guessing they are not all the same....I've never gapped plugs before.....

As I'm getting a tune soon I didn't worry about getting them perfect 'cus I'm going to get new plugs with the next tune....

Would the backfiring and reluctancy to accelerate be the plugs still ?????????