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#1
09-10-2005, 06:52 PM
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Intake Manifold Tuning Valve (IMTV) modification
i was playing around with the valve and i want it to open when i want it to. is there a relay for the valve or does it get its power from the ecm? i want to rig up a switch so i can choose when i want to power instead of the computer. it only kicks in if i'm flooring it or 75% floored. i know this because i took the truck for a drive with a meter on it. one of my main goals is to get it to open when i want more power up a hill but not to shift into passing gear. is there a relay or what powers it?
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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
09-10-2005, 09:47 PM
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Re: Intake Manifold Tuning Valve (IMTV) modification
No need to open it at any other time.
You will hurt your torque opening it to early. Just leave it alone.
__________________
1995 Factory Blazer Service Manual for sale, PM if interested.
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#3
09-10-2005, 10:15 PM
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Re: Intake Manifold Tuning Valve (IMTV) modification
i'm going to try it tomarrow. if it doesn't work i'll just pull it off.
__________________
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
09-11-2005, 02:03 AM
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Re: Re: Intake Manifold Tuning Valve (IMTV) modification
Quote:
When the torque curve starts to drop in the higher rpms it opens to promote more high rpm torque. Opening it early won't do anything.
__________________
1995 Factory Blazer Service Manual for sale, PM if interested.
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#5
09-11-2005, 08:48 AM
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Re: Intake Manifold Tuning Valve (IMTV) modification
ok. i didn't really see much of a difference when opening it early but being able to hold it in the whole time instead of kicking off at 4,500. now the truck cherps 2nd gear and pulls strong the whole time its floored.
__________________
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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#6
09-11-2005, 05:51 PM
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Re: Intake Manifold Tuning Valve (IMTV) modification
It doesn't kick off at 4500 normally. It stays open depending on throttle angle and load.
__________________
1995 Factory Blazer Service Manual for sale, PM if interested.
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#7
09-11-2005, 07:12 PM
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Re: Intake Manifold Tuning Valve (IMTV) modification
i took the truck out for a test drive with a meter. it kicks off at 4,500. thats why when it hits that it dosen't pull as hard as it did at 4,000.
__________________
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
09-11-2005, 07:21 PM
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Re: Re: Intake Manifold Tuning Valve (IMTV) modification
Quote:
__________________
1995 Factory Blazer Service Manual for sale, PM if interested.
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#9
09-11-2005, 07:39 PM
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Re: Intake Manifold Tuning Valve (IMTV) modification
stock. no mod.
__________________
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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#10
09-12-2005, 12:03 AM
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Re: Intake Manifold Tuning Valve (IMTV) modification
Ah, yes, it will seeing at those rpms the torque curve is not needed as much.
__________________
1995 Factory Blazer Service Manual for sale, PM if interested.
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