I feel stupid.
Thread Starter
Tech Contributor
Joined: Oct 2008
Posts: 3,729
Likes: 190
From: Custer, WI
I feel stupid.
I've been chasing a misfire on the 85 and just figured out today that I may be one of the most stupid people I know!
I changed the plugs, replaced an o2 sensor because the car was getting bad mileage..today I thought I would check the injectors.
As i'm pulling the connectors off, i realize that #7 ISN'T CONNECTED.
WTF.
Plugged it in, all is well. Mileage is close to back to normal about 25 mpg at 60mph.
Did anyone else lose a few MPG when they upgraded runners/plenum/base?
I know its flowing more air now, but i thought that maybe the fact that the air is flowing more freely it would actually give me a mpg or 2.
I changed the plugs, replaced an o2 sensor because the car was getting bad mileage..today I thought I would check the injectors.
As i'm pulling the connectors off, i realize that #7 ISN'T CONNECTED.
WTF.
Plugged it in, all is well. Mileage is close to back to normal about 25 mpg at 60mph.
Did anyone else lose a few MPG when they upgraded runners/plenum/base?
I know its flowing more air now, but i thought that maybe the fact that the air is flowing more freely it would actually give me a mpg or 2.
Drifting
Joined: May 2006
Posts: 1,428
Likes: 7
From: Chewelah Wa
I think whenever you "flow more air" you are giving up some torque down low for HP up higher in the powerband. At 65, your car is as low as a car gets RPM wise. My car gets exactly 25mpg at 65 on level road. It is a 85 also...you auto or 4+3?
Safety Car
Joined: Jan 2004
Posts: 3,783
Likes: 15
From: Northern California
More Air doesn't mean better MPG's.
An engine needs the Proper Ratio of Air & Fuel to burn efficiently. With more Air an engine needs more Fuel in order to burn efficiently and produce the Maximum amount of power.
Mass Air Flow (MAF), (MAP) and O2 sensors monitor the amount of Incoming air and report to the computer which adjusts the fuel to get the proper ratio.
An engine needs the Proper Ratio of Air & Fuel to burn efficiently. With more Air an engine needs more Fuel in order to burn efficiently and produce the Maximum amount of power.
Mass Air Flow (MAF), (MAP) and O2 sensors monitor the amount of Incoming air and report to the computer which adjusts the fuel to get the proper ratio.
Last edited by GKK; Sep 2, 2009 at 11:56 PM.
Thread Starter
Tech Contributor
Joined: Oct 2008
Posts: 3,729
Likes: 190
From: Custer, WI
Would I benefit from a tune? Or will I have to do more mods before it would actually help me?
So far i have..
Ported plenum, Ported base, AS&M's, gutted cat, open air lid, relocated IAT Sensor (removed from plenum because it was an airflow blocker) and the "monza" mufflers.
So far i have..
Ported plenum, Ported base, AS&M's, gutted cat, open air lid, relocated IAT Sensor (removed from plenum because it was an airflow blocker) and the "monza" mufflers.
Drifting
Joined: May 2006
Posts: 1,428
Likes: 7
From: Chewelah Wa
I am also curious how much our cars could benefit from a chip tune. My mods are similar to yours, minus the runners. How much of a top end increase did you get with the runners and ported base?? Mine falls flat on it's *** at 4 grand.
Thread Starter
Tech Contributor
Joined: Oct 2008
Posts: 3,729
Likes: 190
From: Custer, WI
I"m not real experienced with engine building, since i'm only 17 but i can feel an increase.
I'd say that it pulls up to about 4500, i'm not sure though.
That loose injector wire made a world of difference, I JUST got back from a "drive" and it hauls even more *** than I want it to. (even tho thats not possible)
If i would get a tune, i think i would get one from Ed Wright..everybody seems to like his chips. his website is www.fastchip.com
I think its a good alternative to PCM for less because they don't tune 85's. Ed does.
I'd say that it pulls up to about 4500, i'm not sure though.
That loose injector wire made a world of difference, I JUST got back from a "drive" and it hauls even more *** than I want it to. (even tho thats not possible)
If i would get a tune, i think i would get one from Ed Wright..everybody seems to like his chips. his website is www.fastchip.com
I think its a good alternative to PCM for less because they don't tune 85's. Ed does.
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Thread Starter
Tech Contributor
Joined: Oct 2008
Posts: 3,729
Likes: 190
From: Custer, WI