problem with lower rpms and boost in general
 

92 galant vr4, 550cc injectors, bigger pump, 16g, 2.5 in ss exhaust(i think it might have an exhaust leak judging by sound) no tuning

this problem was worse before i put some band new bosch platinum plugs in and now it runs smoother while boosting but has the problem..

anyway my car HATES lower rpm's.. just sometimes doesn't even wanna move..

anyway after that if i floor it.. it builds full boost(no problem ever building full boost you can hear the turbo spooling but no go), goes slow and i let off and it kind of pops.. if it does that and i slowly let off and progressively give it gas.. it goes fine....usually

also sometimes its just kind of rough but goes like hell no problem..

AND my dip stick shoots out and spits oi everywhere :) but the dip stick slides in and out of the thigy no prob.. no real pull action reqired.. there is resistence but not much AT ALL.

anyway the motor supposedly has around 15k on it and the car 141k.
does it just need to be tuned? is the turbo blown?(no smoke from exhuast pipe or anywhere i checked) and ya.. could it be the bov leaking? a boost leak in general? am i loosing pressure cause of my dipstick popping out? knowing my luck its all of these but ya..

also wednesday i think im gona stop by lse and get a compression check(dont have the stuff to do it myself) so ya if anyone from lse chimes in on this thread.. pm me or ill call ya.

but any suggestions are great..

Re: problem with lower rpms and boost in general
 

So you have bigger injectors and no s-afc/maf-t/eprom?

Re: problem with lower rpms and boost in general
 

Ditch the Bosches and get some NGKs.

Doesn't that motor come with 510cc injectors? If so you are running rich.

Definitely do a boost leak test.

Re: problem with lower rpms and boost in general
 

3 things:

1. Install NGK BPR7ES spark plugs
2. Buy an AFC and get your car dyno-tuned
3. Buy a new dipstick from Mitsu (we seriously deal with this same problem on this board at least once a week, spend the $14 and fix it right, not some ghetto-hack way with zip-ties, tape, or pliars)

Re: problem with lower rpms and boost in general
 

Yes, no (450cc is stock, he has 550cc aftermarket), and yes.

Re: problem with lower rpms and boost in general
 

Oh, ok, so not the same as the japanese version with the small 16G and 510's. 14b and 450s.

Very rich then.

Re: problem with lower rpms and boost in general
 

FYI, not all JDM Cylcone 4G63 engines came with the 16G and 510cc injectors.

This is terible advice but I'll give it anyways: If you are too cheap to actually fix your car the right way you could just hack the hell (Blaha-style) out of your MAS and hope that makes it run better.

Re: problem with lower rpms and boost in general
 

For sure. Something like 1 in 5.

Swapping to a 2G MAS might be an option as well.

Re: problem with lower rpms and boost in general
 

I would run a palm and see what the ECU says. BPR7ES are the way to go on a dsm.

~John

Re: problem with lower rpms and boost in general
 

Ahh, the old 2G MAS + 550's mod. Now that's old school for ya!

Re: problem with lower rpms and boost in general
 

Blaha + 550's is older ;)

Re: problem with lower rpms and boost in general
 

he didnt say 2g..

as for hacking the maf its in the plans..

i think its a boostleak cause its reminding me of my old talonwhen it had one.. but it idles fine which is weird..

anyway if i keep it im goign to throw a afc and tune it.. otherwise i think im gonna sell it no matter how easy the fix and leave the dsm world again lolso ya if you want the car pm me.. otherwise ill fix it. its fine driving as is

Re: problem with lower rpms and boost in general
 

Ditch the Bosch, the only thing they are good for is paper weights in our cars.