going out of my mind with my z28
09-16-2007 | 01:15 PM
#1
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From: poplar bluff mo
Car: 2011 dodge journey
Engine: v6 vvt
Transmission: auto
Axle/Gears: ???
going out of my mind with my z28
I have changed everthing under hood and on car related to electrical or fuel short of injectors and fuel pump and car still runs terrible its a 91 z 305 tpi will start and run for 10 sec or so but when I give any throttle to the motor it just bogs down and when I release it,,it goes back to reg idle spd then dies I have thought myself all of Ideas I have a ac delco pump coming in mail anybody have any other suggestions??? PLEASE HELP!!!!
steve
steve
09-17-2007 | 12:58 AM
#3
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Senior Member
Joined: Dec 2006
Posts: 308
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From: poplar bluff mo
Car: 2011 dodge journey
Engine: v6 vvt
Transmission: auto
Axle/Gears: ???
Re: going out of my mind with my z28
well I took my tpi unit off when I put a new FPR on and I cleaned it but it was doing this before I took it off so what are you meaning by the tpi unit??
09-17-2007 | 01:19 AM
#4
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Joined: Jan 2007
Posts: 1,873
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From: OC CA
Car: 75 Beast
Engine: 383 +EBL Flash
Transmission: 700R4
Axle/Gears: 4.11 with 33"
Re: going out of my mind with my z28
92RS
In order to troubleshoot your problem - you'll have to precisely describe the nature of the problem, what you have replaced so far, all mods, car particulars, miles, etc, etc.
Trouble shooting these engine control systems requires a (small) bit of electronics knowledge and an investment in DVM.
Let us begin.
1)
Since we do not know the state of your fuel system I would strongly recommend that you go to auto-parts store and RENT a fuel pressure tester. TPI systems require about 45 PSI (give or a take). If Fuel Pump is weak and is not delivering ample amount of fuel to injector rails there little chance for engine to run.
2) Just by a chance there is always a possibility that we may have a dead TPS sensor or bad harness connector. Locate that bugger ( do you have a basic service manual covering your car???). Set one lead of DVM (negative ) to engine ground, the other back-probe Pin B of the TPS connector. Engine OFF, Key in running position - with throttle in idle position DVM should read 0.4 to about 0.6 Vdc. Slowly move throttle from idle to WOT. DVM reading should steadily increase from idle reading to about 4.2 to 4.5 Vdc. Look for sudden voltage jumps - a good TPS should provide nice, continuous voltage.
Perform the two test above and post results. Changing sensors, modules, etc blindly will not solve problem quickly and will result in a thinner wallet.
//RF
In order to troubleshoot your problem - you'll have to precisely describe the nature of the problem, what you have replaced so far, all mods, car particulars, miles, etc, etc.
Trouble shooting these engine control systems requires a (small) bit of electronics knowledge and an investment in DVM.
Let us begin.
1)
Since we do not know the state of your fuel system I would strongly recommend that you go to auto-parts store and RENT a fuel pressure tester. TPI systems require about 45 PSI (give or a take). If Fuel Pump is weak and is not delivering ample amount of fuel to injector rails there little chance for engine to run.
2) Just by a chance there is always a possibility that we may have a dead TPS sensor or bad harness connector. Locate that bugger ( do you have a basic service manual covering your car???). Set one lead of DVM (negative ) to engine ground, the other back-probe Pin B of the TPS connector. Engine OFF, Key in running position - with throttle in idle position DVM should read 0.4 to about 0.6 Vdc. Slowly move throttle from idle to WOT. DVM reading should steadily increase from idle reading to about 4.2 to 4.5 Vdc. Look for sudden voltage jumps - a good TPS should provide nice, continuous voltage.
Perform the two test above and post results. Changing sensors, modules, etc blindly will not solve problem quickly and will result in a thinner wallet.
//RF
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