Boostin Prob PLEASE HELP!!!!

[protege321]

i have the same exact issues, i would say fuel might have something to do with it as well.

 

[dacquesta1]

how many miles on your fuel injectors?

 

[js_protege_03dx]

damn, i was hoping it was that...well is it a problem you've had before the mods, or after. any black smoke? any signs of detonation. what do your plugs look like? is the jacket on the electrode cracked at all?

ive had the prob since ive been turboed.. jus seemes like its alot more worse/noticable now, after i rebuilt wit forged internals.. and what would black smoke mean? how would i know if im detonating? i always run premium... plugs are brand new i can check em but if they were the prob i would think it would effect the car while cold too...

 

[dacquesta1]

you have forged internals? what rods/pistons/CR/what turbo and psi?...black smoke would mean excessive amount of fuel in the cylinder, unburnt gas. detonation/pre-ignition is known as knock. it would feel almost like an ever so slight miss-fire, maybe a bit harder.

 

[heckaTIGHTis]

okay so that throws out the possible o2 being the prob.. what r yur afr's? and mods??

Not sure about my afr because I don't have a wideband . I bought the car completely stock but it was obvious that it was modified before. It had a cracked stock manifold and leaky WGA (which was causing fuel cut) so I put in a Thunder V2 manifold and a Forge WGA. Then I put a turbohoses smic and samco hot pipe, and an Inject cai. Oh, and a prosport boost gauge.

 

[justanothermp5]

AFR's are spot on, 14-15 out of boost, 12-11 in boost, ive been told i get black smoke when i go in boost but the AFR's are in the 12's so i would expect some soot, no detenation

forged engine, 8.5:1 CP, gt25, right now im only running 6-7 psi until i get this figured out

My "cold" pipes were literally scorching hot when i parked it and i have a pretty efficient IC, or on paper it is

 

[js_protege_03dx]

you have forged internals? what rods/pistons/CR/what turbo and psi?...black smoke would mean excessive amount of fuel in the cylinder, unburnt gas. detonation/pre-ignition is known as knock. it would feel almost like an ever so slight miss-fire, maybe a bit harder.

the injectors have prob 110k miles on them but i have 440's to put in once i get the ssafc put in.. and look at my sig and u will see what i have and i have the stock turbo and runnin stock boost.. at teh moment..
wiesco pistons and k1 rods... 8:5:1 compression

 

[dacquesta1]

well here's going to be my best guess without actually driving the car or seeing it in person. both of you are running lower compression pistons with an ecu designed for 7? psi on 9.1:1 compression. the ecu already ran rich, along with lower compression could be making it more noticeable. you able to up the boost and see if it is less noticeable? watch your afr though if you can.

this is an issue ive had on my mind with my forged motor when i drop it in. i have a 2000es. the ecu is for the fp-de and im dropping a forged fs-de with 8.8:1 compression and fp injectors. dunno how thats going to be. should be alright though. ive been thinking there is a chance it could run overly rich, which is what could be happening to you.

 

[js_protege_03dx]

well here's going to be my best guess without actually driving the car or seeing it in person. both of you are running lower compression pistons with an ecu designed for 7? psi on 9.1:1 compression. the ecu already ran rich, along with lower compression could be making it more noticeable. you able to up the boost and see if it is less noticeable? watch your afr though if you can.

this is an issue ive had on my mind with my forged motor when i drop it in. i have a 2000es. the ecu is for the fp-de and im dropping a forged fs-de with 8.8:1 compression and fp injectors. dunno how thats going to be. should be alright though. ive been thinking there is a chance it could run overly rich, which is what could be happening to you.

if thats the case wont the ssafc be able to tune for this? i have been thinkin the same thing too.. but i thought many ppl who went forged went this route and had no problems! like still usin the stock ecu and all? well i jus hope the afc can tune for this... and justanothermp5 has the ssafc too...

 

[heckaTIGHTis]

well here's going to be my best guess without actually driving the car or seeing it in person. both of you are running lower compression pistons with an ecu designed for 7? psi on 9.1:1 compression. the ecu already ran rich, along with lower compression could be making it more noticeable. you able to up the boost and see if it is less noticeable? watch your afr though if you can.

this is an issue ive had on my mind with my forged motor when i drop it in. i have a 2000es. the ecu is for the fp-de and im dropping a forged fs-de with 8.8:1 compression and fp injectors. dunno how thats going to be. should be alright though. ive been thinking there is a chance it could run overly rich, which is what could be happening to you.

My msp only has bolt-ons

 

[mazdaspeedp]

my msp does same thing except for when its winter then it pulls all the time

 

[justanothermp5]

yea i have a SSAFC so the tune isnt the problem, and im with him^ my car pulls hard as hell in the winter, no problems

i really think its just a version of heat soak on our IC pipes

 

[dacquesta1]

could be. thats some nasty awful heat soak....any of you running a fmic?

 

[CHIQLES]

wrap your pipes people you will notice a differnce..my problem is now to much back pressure but thats due to our restrictive exhaust system...

 

[Turbo Smoke]

Your running afr's of 10 WITH a ssafc?

Yes on really hot days I still get 10 to 10.8 AFR's from 4 PSI and up. No hesitation though.

@ js protege - if you do not have your primary o2 sensor hooked up, I would definitely not run your car that way. The ecu NEEDS the primary o2 readings. If it's your secondary o2 you have taken out then it's not so important.

Also, the SSAFC can lean out the afr's regardless of the boost level, within reason of course.

 

[Turbo Smoke]

It's obvious that our s**tty stock rads can not cool our cars effectively, therefore increasing the underhood temps and making the "cold" pipe just as hot as the hot pipe. That's my theory anyway, replace the rad and it will reduce the operating temps.

Although rads aren't cheap, so I'm looking for a cheaper solution. I was thinking: get rid of the coolant lines running to the TB, because that extremely hot coolant running through there must just be making it worse. Also I was thinking of removing the thermostat to increase coolant flow. But I'm wondering if that will increase coolant flow too much to the point that it would not allow the rad enough time to actually cool the coolant flowing through it.

 

[protege321]

i have a corksport rad and it made no difference other than coolor oil temps, the hesitation is still there on hot days. i was planning on routing the hot pipe away from the exhuast manifold, with most FMIC setups the hot pipe runs right next to the exhaust mani, possibly clocking the compressor side of the turbo and running it under or somehow route it around the driver side could eliminate the soak.

 

[js_protege_03dx]

could be. thats some nasty awful heat soak....any of you running a fmic?

i think jus about all of us are running an fmic.. i know justanother and i are..
@turbo smoke.. lol i do have teh primary sensor in... lol the wideband is where the secondary is supposed to be.. haha
@ Chiqles.. i don wana have to wrap the pipes as i really don like the way it would look.. do u think a ceramic coatin will help? or actually where can i get a good piping kit.. i know right now mine uses alot of couplers and clamps and i need new piping setup..

 

[justanothermp5]

i have a corksport rad and it made no difference other than coolor oil temps, the hesitation is still there on hot days. i was planning on routing the hot pipe away from the exhuast manifold, with most FMIC setups the hot pipe runs right next to the exhaust mani, possibly clocking the compressor side of the turbo and running it under or somehow route it around the driver side could eliminate the soak.

nope lol thats how i run mine, still hesitates, i would wrap the pipes but thats kinda extreme IMO, plus i dont have 40 bucks to drop on some heat wrap that may or may not make a difference

 

[protege321]

nope lol thats how i run mine, still hesitates, i would wrap the pipes but thats kinda extreme IMO, plus i dont have 40 bucks to drop on some heat wrap that may or may not make a difference

where do you have the turbo intake located, fender or in the engine bay?

i know when i was NA, there was a noticeable difference between the intake mounted in the bay compared to in the fender even on hot days. obviously the point of a FMIC is to cool the air so why would we need a cai, but its not doing its job, so why not.