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#1
10-01-2004, 04:03 PM
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Obd1.5
is there any way to convert the 1.5 OBD computer to a OBD2, such as switching it out. what would have to be done? 95 4.3liter V6 CPI. doing for performance reasons. would putting a performance chip in allow me to change setting or not?
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#2
10-01-2004, 04:46 PM
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Re: Obd1.5
Don't start doing that crap bro.
Our computers are technically OBDII but just a more primitive version installed initially when they were doing the switchover. Those chips don't do anything for the performance anyways. Do the usual intake/muffler/under-drive pulleys etc.. before you start frigging around with the computer.
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#3
10-01-2004, 10:29 PM
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Re: Obd1.5
i'm working on the intake now and the exhaust is done.as well as the EGR mod. what do you mean by under-drive pulleys? never heard of it. i was also thinking of the fan conversion and a 180 thermostat, and installing 1.6 ratio roller rockers from comp cam and a MSD ignition. sound good?
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#4
10-02-2004, 03:10 PM
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Re: Obd1.5
Ok, first off, you really need to come down to reality bro.
1.) Take that stupid EGR mod off. Does nothing but cause detonation You will get more horsepower from a properly work EGR system. If you riase combustion temperature, you will get spark knock and your knock sensors will retard the timing and therfore net you LESS horsepower. 2.) Google for underdrive pulleys and learn about them. www.google.com 3.) Fan Conversion is not worth it. The pully fan is only on when you are at idle and the clutch disengages when you accelerate. 4.) 180 Thermostat - Good Mod  Don't go any colder, 180 is the lowest you want to go.5.) Roller rockers are not needed on our truck. We already have roller tipped lifters. 6.) Comp Cam - Can be worth while if you want to do all the work needed for it. 7.) MSD Ignition - Not needed for a stock and non-turbo or supercharged motor. Stock ignition can supply enough voltage for a 454 and is essentially overpowering the 4.3L. Put the money into some nice wheels and tires for your truck.
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#5
10-02-2004, 10:30 PM
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Re: Obd1.5
k thanks for the info. how much of a diff would the under drive pullys make? where can i find a set and whats the price? the roller rockers i was talking about would come from comp cam. would it make any diff or not? i might add a cam later down the line but not now. wheels and tires will come later after the trucks paid off.
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#7
10-02-2004, 10:55 PM
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Re: Obd1.5
yea i know but i'm asking for some stuff for christmas.i'd still like to know about the diff would the under drive pullys would make and about the roller rockers.
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#8
10-02-2004, 10:57 PM
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Re: Obd1.5
Quote:
yes it can be "converted" to OBD2, however you will have to make a trip to the dealership and have the computer flashed. it wont gain you anything other than full OBD2 compliance AFAIK. as for a performance chip, JET makes a module that plugs in to the computer.
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#9
10-02-2004, 11:00 PM
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Re: Obd1.5
would i be able to mod the computer as if it was a OBD2 computer? ball park price?
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#11
10-02-2004, 11:28 PM
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Re: Obd1.5
i understand about the chip but cobra1 was talking about reflashing the computer to OBD2. that was what i was talking about. i'm not going to put a chip in.
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#13
10-02-2004, 11:38 PM
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Re: Obd1.5
then how come when i hook up a programmer i can't play with the computer like a OBD2 computer. could i reflash it to a newer version of OBD2?
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#15
10-02-2004, 11:45 PM
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Re: Obd1.5
can you explain it any better. can it be switched to a newer version or not?
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