uksupra Posted February 23, 2005 Share Posted February 23, 2005 i got a 93 auto TT.. i have a hks ssqv hks fcd bleed valve 2.5 inch exhaust system with seciond cat removed... im running 16psi but at full throttle i get slight hesitation... is it possible to get this resolved on a rolling road or will i need electric gizmos and piggy back ecus??? the reason i ask is that i once took my mr2 to get rolling road tuned and was told they cant tune it as the ecu controls all the fuelling... therefore they said they could only do a power reading.. is this the case? Link to comment Share on other sites More sharing options...
SkyJawa Posted February 23, 2005 Share Posted February 23, 2005 Nope, chances are if your running higher boost and theres slight hesitation that your plugs need changing..... Link to comment Share on other sites More sharing options...
uksupra Posted February 23, 2005 Author Share Posted February 23, 2005 do i need lower temp plugs??? it only happens when u r flat out... up to that point the car pulls hard... Link to comment Share on other sites More sharing options...
SkyJawa Posted February 23, 2005 Share Posted February 23, 2005 Yup, sounds like plugs! If they are stock ones its defo the case. If they are cooler plugs it may just be time for them to be replaced. I fitted some Denso IK24's to mine, did the job nicely. Other recommend NGK PFR7's I think, but if you do a search theres plenty of spark plugs threads around Should get you sorted Link to comment Share on other sites More sharing options...
uksupra Posted February 23, 2005 Author Share Posted February 23, 2005 thanks ill give that a go... what sort of cost are they???? can you buy in a pack of 6??? Link to comment Share on other sites More sharing options...
tDR Posted February 23, 2005 Share Posted February 23, 2005 Best value plugs (under a tenner a set of 6) are NGK BCPR7ES copper plugs. BKR7E will also do the trick. Both are one grade colder than stock... gap them at between 0.8mm and 0.9mm. Hope this helps, Brian. Link to comment Share on other sites More sharing options...
SkyJawa Posted February 23, 2005 Share Posted February 23, 2005 If you go for the denso they are iridium and last much longer - supposedly up to 40k miles where you'll have to change the NGK's every 10 or so IIRC. Think I paid 60 quid for the Denso's (all 6). Link to comment Share on other sites More sharing options...
uksupra Posted February 23, 2005 Author Share Posted February 23, 2005 im gonna try that over the weekend!!! hardly ever get flat out but was suspectin that i was maybe detonatin!!!! so a rolling road session wont do anything for me?? Link to comment Share on other sites More sharing options...
SkyJawa Posted February 23, 2005 Share Posted February 23, 2005 Nope - change the plugs and it should go, if not then get it looked at! Link to comment Share on other sites More sharing options...
hadyn Posted February 23, 2005 Share Posted February 23, 2005 your standard fuel pump may also be well past its sell by date and cant supply enough fuel at higher boost - get a walbro pump too Link to comment Share on other sites More sharing options...
SkyJawa Posted February 25, 2005 Share Posted February 25, 2005 your standard fuel pump may also be well past its sell by date and cant supply enough fuel at higher boost - get a walbro pump too Thats probably overkill, I'd doubt the stock pump is caput, mine on my 1993 was fine running at BPU. Always a good safety mod to do though! Link to comment Share on other sites More sharing options...
LeeT Posted February 25, 2005 Share Posted February 25, 2005 If you go for the denso they are iridium and last much longer - supposedly up to 40k miles where you'll have to change the NGK's every 10 or so IIRC. Think I paid 60 quid for the Denso's (all 6). the ngk's need changing every 3>4k. Link to comment Share on other sites More sharing options...
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