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#1
11-20-2006, 06:55 PM
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cpi again? maybe MFI conversion
i changed my cpi out like 2 years ago and now my truck has started idleing a little rough and if it sits all night and i smell the intake it smells like gas. could it have gone up again? no ses and drives other wise ok. about 260 on 16 gals of fuel. not to bad. most of it is city. it a 95 with the cpi. obd 2 version. now i read in one of the performance posts about replaceing the Poppet injection with a MFI. can i do this and is it worth it. i'd like to keep the intake i got on it. i like how when around 2,500-3,000 when the intake valve opens up it feels like turbo. also the exhaust has got a smell of gas to it when it's cold. it was fine and then one day it started idleing bad. it idles like it's cammed up which is kinda cool but i know something's wroung. any idea on what to do?
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95 jimmy. Vortec V6. 4.3 liter CPI. ,2.5" catco cat, 2.5" cat back with flowmaster muffler split rear., 40 street series, 2 12" audiobahns in custom box,K&N CPI intake system. 71 Mustang coupe- project car. stock 302 with Cobra intake, holley 650dp, afco racing radiator, headman headers, msd distributor, 2.5" from the headers.C4 tranny with shift kit, Mach 1 body lay out. 90 cav, 2.2 tbi, gas getter. 99 chevy s10 zr2, 6" lift, duel exhaust. 5 speed. 
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#2
11-20-2006, 07:14 PM
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Re: cpi again? maybe MFI conversion
It may be cracked fuel lines inside the plenum. Anything that causes the motor to misfire will give the exhaust a gasoline smell. Done a tune-up lately?
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#3
11-20-2006, 07:37 PM
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Re: cpi again? maybe MFI conversion
maybe 20,000. new nut kit with the cpi. all is about 2 yrs old.
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95 jimmy. Vortec V6. 4.3 liter CPI. ,2.5" catco cat, 2.5" cat back with flowmaster muffler split rear., 40 street series, 2 12" audiobahns in custom box,K&N CPI intake system. 71 Mustang coupe- project car. stock 302 with Cobra intake, holley 650dp, afco racing radiator, headman headers, msd distributor, 2.5" from the headers.C4 tranny with shift kit, Mach 1 body lay out. 90 cav, 2.2 tbi, gas getter. 99 chevy s10 zr2, 6" lift, duel exhaust. 5 speed.
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#4
11-20-2006, 07:45 PM
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Re: cpi again? maybe MFI conversion
Quote:
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#5
11-21-2006, 12:13 AM
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Re: cpi again? maybe MFI conversion
Looks like the plenum needs to be opened again.
Did you see the post where you can order the nut kit and/or regulator from the auto parts stores that have the HELP parts display? Fair prices and pretty quick delivery.
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#6
11-21-2006, 02:00 AM
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Re: cpi again? maybe MFI conversion
probably a bad regulator again, there is a how to by rlith in the how to section on how to replace only it.
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1995 Factory Blazer Service Manual for sale, PM if interested.
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#7
11-25-2006, 09:57 PM
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Re: cpi again? maybe MFI conversion
can you send the link and part # for just the regulator?
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95 jimmy. Vortec V6. 4.3 liter CPI. ,2.5" catco cat, 2.5" cat back with flowmaster muffler split rear., 40 street series, 2 12" audiobahns in custom box,K&N CPI intake system. 71 Mustang coupe- project car. stock 302 with Cobra intake, holley 650dp, afco racing radiator, headman headers, msd distributor, 2.5" from the headers.C4 tranny with shift kit, Mach 1 body lay out. 90 cav, 2.2 tbi, gas getter. 99 chevy s10 zr2, 6" lift, duel exhaust. 5 speed.
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#8
11-25-2006, 11:45 PM
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Re: cpi again? maybe MFI conversion
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2000 Chevy Blazer ZR2 Performance Mods: Numerous Suspension Mods: Some, but not enough Exterior Mods: Just Right 1987 Buick Turbo T Dark Red Low 11 sec sleeper  .030 4.1 block, PT6262E, & other odds and ends.... My Cardomain
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#9
11-26-2006, 09:52 PM
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Re: cpi again? maybe MFI conversion
Here's more info.
http://www.automotiveforums.com/vbul...d.php?t=518850
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