Not Revving Past 4k

[Matex]

Hey all

Had a search through other posts but couldn't find any that explained my problem.

95% of the time the car drives perfectly. This morning she wouldn't rev at all, wasn't flat footing it, just normal everyday driving style and she kept cutting out till i shifted into 3rd and than the problem went away. Happened everytime i stopped at lights ie 1st and 2nd coughing and spluttering than 3rd and above normal. Checked that the AFM is plugged in, boost guage reads 12 PSI with no boost spiking running a normal bleed valve.

When i drove home from work earlier today (sore back, don't ask) she drove like nomral. Only happened when i was almost home and gave her a bit, wouldn't rev past 4K and kept on cutting out. Looked at the boost guage and was sitting at 12 PSI.

Got a mate round to show him and car drove normally. Revved past 4K and pulled strongly through all gears.

Also it would seem that my bleed valve isn't working. I have the thing shut so that it should be at the stock boost pressure but she's still reading 12 PSI. Could that be it ???

Finally i recently installed a Hybrid bolt on intercooler kit. 600 X 300 X 76. Now my bonnet won't shut properly as we had to remove the centre bit to install the intercooler. We knocked up a peice of metal to hold the latch in place but it won't pop the hood unless someone is pulling it up and it moves up and down in the wind as i am driving

Any ideas as to these problems?

Thanks

[hanyou]

i had that problem b4 found my air flow meter was faulty. it jus spluttered and didnt rev whenever it felt like lol

but also do check ur intercooler pipping, mite wana also check ur spark plugs

[psybic]

I remember my 3SGTE was so shit, in stock form, it just got worse and worse, till finally, I wondered if it would even make it the short drive to the workshop where I was having an aftermarket ECU installed.

I never thought about it much again because the car was alive and double the power of ever before after the tune. I was half expecting to be told the engine was dead.

I am amazed how many people have problems related to running rich, as I did and don't just get an aftermarket ecu of some sort. SAFC if you have a low budget.

One thing leads to another when you run rich, you'll use more fuel, you'll block up your cat, etc.

Just get an safc and a tune, if not one better and get a full aftermarket ecu, make sure you have NO boost leaks. get rid of you bleed valve if you have it shut.

[Matex]

pulled one of the spark plugs. Looks like its at the end of its life. Little electrode bit is nearly gone ( I think thats what its called ) but the rest looks ok so i'm going to go get some spark plugs and we'll see what happens. Any spark plugs recommended ???

[race_snooze]

why only 1 plug gone, that seems a bit strange they should all be in the same condition.

[Matex]

Pulled all the plugs, in same condition, changed them all to iridium plugs and all is pretty sweet now, thanks for the help guys!

[Matex]

Now it won't rev past 4.5 at full throttle. Starts spluttering and coughing. 3/4 and she revs to about 4700 but keeps cutting out. At half throttle however it revs out to 7 no problem. Any ideas as to what could be the problem. Installed some iridium plugs today but this problem is annoying me.

[Craved]

get BCP6ES coppers at .8mm gap

your iridiums are probably at 1 or 1.2mm gap which may be too large for your coils and boost pressure.

[EKSMUD]

Now it won't rev past 4.5 at full throttle. Starts spluttering and coughing. 3/4 and she revs to about 4700 but keeps cutting out. At half throttle however it revs out to 7 no problem. Any ideas as to what could be the problem. Installed some iridium plugs today but this problem is annoying me.

check your coils...

[raz0r$harP.UK]

i bet your afm is intermittently working.. try find some one to swap with and test it..

[Einstein]

last time i encountered this problem it was a blown turbo

lucky it wasn't my car

[sinistaGTR]

check your cooler piping too, i had a a hairline split in one of the stop black joiner hoses, couldnt find it till i insoected each one hard core lol. and would only open up on boost.

[bretto]

air flow meter, check and then let us know

[BAMR33]

It sounds like the fuel pump is on the way out. That would explain why it wouldn't rev past 4k.