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serious gas problem please help

 
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Old 09-20-2010, 04:08 PM
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serious gas problem please help

alright here's the dl of my issue.

my car:
92 si 94 h22a swap with 80k on engine

problem:
recently installed new blox tps after my cel came on and was suffering from all the issues associated with faulty tps. got the cel to turn off with new tps. but now im getting absolutely terrible gas mileage like 12 to a gallon. on start up I get a big puff of white smoke and as I'm driving occasional fuel smell but not very often. also I get what feels like a bogging down of the engine when throttle is 15% or less in all gears. besides they bogging sensation ity also feels jerky like air bubbles popping if I give it more had it speeds up just fine but as soon as I reduce throttle again it goes back to bogging down I have no idea what this is but I've got no cel but if I don't get a solution soon I will have to get rod of the car because I can't afford this type of gas mileage. if anyone has input or any info please don't hesitate to say anything. I really enjoy this car don't wan't to get rid of it.
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Old 09-20-2010, 09:07 PM
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Re: serious gas problem please help

Have you unhooked the negative terminal on your battery, or removed the CLOCK RADIO fuse (10A) from the fuse/relay box under the hood for 10 seconds to reset the ECU?
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Old 09-20-2010, 10:25 PM
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Re: serious gas problem please help

I will go ahead and try it I'm a novice so If you could explain your reasoning am I just resetting the electrical.
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Old 09-21-2010, 12:09 AM
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Re: serious gas problem please help

Your ECU remembers CELs and under certain circumstances will run a different fuel map thats less efficient but safer for the engine.

Resetting the ECU will guarantee, notwithstanding a bad sensor, the CEL will be wiped from the memory, and the default and proper fuel map should be run.
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Old 09-21-2010, 01:14 AM
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Re: serious gas problem please help

alright so iwent out and reset it. I'll have to wait to se how it runs in the morning and I'll post results thanks man for explaining this to me.
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Old 09-21-2010, 10:16 AM
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Re: serious gas problem please help

alright I drove this morning to class I went 3 or 4 miles and it drove awesome. got on the highway it drove just fine but my gas meter drops twice before I get off the highway 15 min later going 70mph get into a school zone at 15mph and it starts pttering once again and by the time I get to my school it drops one more notch on the meter. now I don't know if I am supposed to see an immediate change or it may take a little while to see a difference and a pickup in mpg I'm hoping utas the latter. hit me back up with your opinion.
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Old 09-21-2010, 04:16 PM
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Re: serious gas problem please help

alright so I've driven about 35 to 45 miles today and my fuel gage has dropped 5 marks that would make it a quarter tank this isn't good and extremely irritating. input from anyone?
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Old 09-21-2010, 09:08 PM
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Re: serious gas problem please help

Quote:
Originally Posted by 92skylude View Post
alright so I've driven about 35 to 45 miles today and my fuel gage has dropped 5 marks that would make it a quarter tank this isn't good and extremely irritating. input from anyone?
Have you done a tune-up lately? Plugs, wires, dist. cap + rotor, filters?
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Old 09-21-2010, 09:36 PM
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Re: serious gas problem please help

nope I havent but ive been looking into prices the lsat couple days but thx for the advice some threads make it sound like a possible o2 sensor problem.
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Old 09-21-2010, 10:21 PM
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Re: serious gas problem please help

Could be running rich if it is an o2 sensor problem but all you did was change the TPS?
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Old 09-22-2010, 12:05 AM
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Re: serious gas problem please help

i have no friggin clue though its driving me crazy cuz its my dd right now and its costing me a butt load maybe I'll take it on to get it diagnosed. dos anyone know if I get it diagnosed should that pinpoint what exactly or at least close to what is going on? like where the engine is running faulty right now.

Last edited by 92skylude; 09-22-2010 at 01:58 AM.
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Old 09-22-2010, 12:01 PM
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Re: serious gas problem please help

could it be the iac valve I just got out diagnosed but they told me I needs a new iac to start with. they want to charge me 337 for it and 450 for part and installation. they also said that's just the start it might not even side the problem. at least they are honest upfront. plz I need opinions oh and how hard is it to change yourself if I just but it online.
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