just got tuned after new part install and car goes crazy, need help
#1
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just got tuned after new part install and car goes crazy, need help
OK so i just installed Kelford 260 cams, BC valve springs and PTE 6266. im having very very bad sputtering problems after tune
supposedly the car ran good on a dyno i was at work while it was on the dyno
we tested it on the street it started sputtering a little in high RPM. He made some adjustments then realize I was low on gas, almost on E.
we put some gas and then start acting better. After I left the shop it started sputtering just a little bit like it did before I put gas in it. So I get on interstate and give it all she's got and blow one of the intercooler pipes off. i drove home fine and stayed out of boost until i could put it back on
After getting home and putting the I.C. pipe back on and taking off for a ride it just went crazy. Its sputtering out of control like its out of gas. Now it can barely move while its sputtering and it runs rich as Crap just crusing. once i try getting into boost it goes all the way lean. And everytime I put in the clutch it shuts off.
My guess is since we doubled the fuel pressure at the REG from 20psi to 40 psi the fuel pump sucked up a lot of junk and now it is clogged with the filter
also the tuner says my RC 650cc are almost at 100% duty cycle at 427 HP, this just does not seem right. im running a walbro 255
please help, it seems like i cant get a break with this thing. im going to buy a new filter, spark plugs and aeromotive 340 or aem 320 pump
sorry MODS if this needs to be moved to performance section please do.
supposedly the car ran good on a dyno i was at work while it was on the dyno
we tested it on the street it started sputtering a little in high RPM. He made some adjustments then realize I was low on gas, almost on E.
we put some gas and then start acting better. After I left the shop it started sputtering just a little bit like it did before I put gas in it. So I get on interstate and give it all she's got and blow one of the intercooler pipes off. i drove home fine and stayed out of boost until i could put it back on
After getting home and putting the I.C. pipe back on and taking off for a ride it just went crazy. Its sputtering out of control like its out of gas. Now it can barely move while its sputtering and it runs rich as Crap just crusing. once i try getting into boost it goes all the way lean. And everytime I put in the clutch it shuts off.
My guess is since we doubled the fuel pressure at the REG from 20psi to 40 psi the fuel pump sucked up a lot of junk and now it is clogged with the filter
also the tuner says my RC 650cc are almost at 100% duty cycle at 427 HP, this just does not seem right. im running a walbro 255
please help, it seems like i cant get a break with this thing. im going to buy a new filter, spark plugs and aeromotive 340 or aem 320 pump
sorry MODS if this needs to be moved to performance section please do.
Last edited by kinch09; 04-17-13 at 04:19 PM.
#3
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like lex said make sure your timing is correct. First time I went on the dyno I kept getting mixed numbers and timing kept getting thrown off. Turns out my aftermarket cam gears weren't bolted down properly so it kept retarding itself and advancing.
Also make sure all your vacuum lines are on and secured properly. I dont know where you got your walbro but hopefully it isn't a fake. I believe you there are way to visually inspect to make sure that is not the case. Also start looking for a new tuner.
Also make sure all your vacuum lines are on and secured properly. I dont know where you got your walbro but hopefully it isn't a fake. I believe you there are way to visually inspect to make sure that is not the case. Also start looking for a new tuner.
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there are only 2 shops here that tune and the other from what ive been told is a conartist. it really sucks paying someone so much money to tune and this happens...not saying it the tuner idk thats why i made this thread. but they did tune my car before the install and i didnt have any problems.
im using 93 octane and i plan on checking all vacuum lines, timing and replacing pump, filter and plugs
im using 93 octane and i plan on checking all vacuum lines, timing and replacing pump, filter and plugs
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#8
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if the 650s are done at 430whp then it sounds like the pump or regulator is on its way out and the injectors are compensating. The part about it going rich first makes me think it's the regulator. Your tuner should have had someone watch the fuel pressure gauge if it was on the regulator and confirmed he's having to compensate for pressure issues. Maybe he did. Ask him.
#9
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if you want to preserve your investment and have your car running safely to its fullest potential , contact alpha at inductionperformance.com.. you can fly him in .. hes one of the top 5 tuners in the country .. check supraforums , his screname is alpha .. he will make sure car runs as it should
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if you want to preserve your investment and have your car running safely to its fullest potential , contact alpha at inductionperformance.com.. you can fly him in .. hes one of the top 5 tuners in the country .. check supraforums , his screname is alpha .. he will make sure car runs as it should
yeah it was for around 5 miles i ran with it off. I was going to change them anyways. thanks for the input
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