blackccoupe

hey guys got a turbo d16y7 and recently it has been hesitating real bad and sometimes wont go past 5000 rpm what could cause this bad dist maybe?, not burning oil or collant i dont think so at least any help is appreciated thanks

spoolingb20

See if you have fouled plugs at all, it sounds like your ingition is breaking up in the higher rpms. If plugs look good then I would test your dizzy. If you are not capable of testing the dizzy then I would just suggest swapping out a know good one of a donor car and see if it takes care of your issues.

drtysohc

could be any number of things....did it just start doing this all of the sudden? give us a timeline on what happened.

Code

You could be maxing out your injectors/fuel pump..

blackccoupe

its a dsm t25 got 310 rcs injectors and 255 walbro used to not do it

93supercoupe

crank angle sensor in the distro

drtysohc

what are you tuned on?

blackccoupe

not throwing any codes running a j-k tuning basemap didint do this till a couple months ago

blackccoupe

tried a new distibutor still does it it like real choppy past 5000 doesnt want to pull but pulls hard till then ,maybe head gasket , head lifting this is a d series, i dont think it is maxing out the fuel cause it was fine til a lil while ago

BEST1TUNING.COM

Not a fix but jsut do a plug gap again. OBD2 car?


Modified by BEST1TUNING.COM at 6:05 PM 4/5/2007

blackccoupe

odb1 the plugs were gapped right cold they get off spec by using them ?

blackccoupe

gonan get arp head studs and do u think this gasket will work good

http://cgi.ebay.com/ebaymotors...QrdZ1

BEST1TUNING.COM

I would go with nothing but OEM gasket...ARP studs are great...but I dont think your problem lies in the head lifting.

blackccoupe

what else could it be plugs look good new dist, cap ,rotor ??????????
could the turbo be bad ????

BEST1TUNING.COM

Well since your running a base map...do you have a wideband? Do you know where you are as far as AFR goes? Check fuel preasure if you can. The d16y7 is at peak VE around 4600-5000 stock and im sure on the t25 you are fully spooled by this rpm so if the car has tuning issues this will definately be the problem area. When a motor reaches peak VE it demands fuel and is touchy with ign timing. Was the car running good untill the colder months? If you want, e-mail me your bin so i can get an idea of where your at.

bamboosted

What about your spark plug wires?

blackccoupe

they are ngk not too old like 3 yrs old

blackccoupe

the car smokes a desc amount for a while now plugs are normal color no oil consimption and the rad was a tad low the other day could the head be lifting maybe causign it to cut out?

turbomoe

fouled plugs and you might wanna lean the car out,if runnin hondata or neptune,on different parameters.

CivicVX94

you said you're on a basemap...
has it always done this or is it new?
Alot of basemaps are made with a fuel cut out at a certain psi , maybe this is your problem

blackccoupe

never use to do it

SPOON_BeIgHtEeNsEe

check timing?