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About to break something
This is my first post so bear with me. I have had my 87 Regal Limited for about 2 weeks. It has a stock rebuild w/ about 8,000 miles, green stripes, 93 chip, TH dwn pipe, 3" all the way, k&n, adjustable wastgate, greddy blow off valve, new fuel pump, rebuilt factory turbo. I have receipts for every thing and it appears that everything was done right. ( $12,000 in receipts with the car) I even have a dyno sheet. (270/375 at the wheels) the car has a strange hiccup thing. It sounds like a missfire but it's not all the time. The idle suffers sometimes but then it clears up. I unplugged the maf and it still idled bad. I checked for vacuum leaks and saw nothing. The fuel pressure gauge is broken on the rail (from before the rebuild). It ran great when I got it up until about a week ago. I have full gauges and my egt is reading about 1,000 at cruise. It will get really bad sometimes and I swear its back fired through the intake a few times. It doesn't just miss, it seems like it actually slows the car down when it does this. My tranny seems fine/lock up is working properly. I traded a "cherry" 500 hp el camino for this and I could use some help. This is my first fuel injected performance car so I have no scan tool yet but in a few weeks I will get a turbo link for my laptop..................thanks. Plus I checked the coils and they ohmed out ok.
Last edited by Josh Watson; 08-01-2006 at 03:04 AM. |
#2
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Re: About to break something
Some likely culprits:
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Ken Mosher 1987 GN original owner 650+ HP Black 2015 BMW 328xi XDrive wagon 2012 Volkswagen Tiguan (the Tig!) Night Blue Met (sold) 2006 Trailblazer SS Red Jewel Tint 395 HP AWD (sold) 2014 Silverado LTZ Crew 4WD 2012 Honda VFR 1200F Tahitian Blue (sold) 2015 BMW S1000R Racing Red 2013 Honda CBR500R Red (wife's bike) 2014 Triumph Bonneville T100 2003 Harley Davidson V Rod Anniversary Edition |
#3
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Re: About to break something
Thanks for the info........I check for trouble codes (manual method) and am reading a 34........I'm friends with the guy I got the car from and he has replaced the maf 2 times in the last 10,000 miles (over a 6 year period). Is this normal? btw I appreciate this site.............I'm lost already but it would be o-so-much worse without this resource.....thanks
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#4
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Re: About to break something
Not really "normal", but not surprising either ... especially if they were remanned units.
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Ken Mosher 1987 GN original owner 650+ HP Black 2015 BMW 328xi XDrive wagon 2012 Volkswagen Tiguan (the Tig!) Night Blue Met (sold) 2006 Trailblazer SS Red Jewel Tint 395 HP AWD (sold) 2014 Silverado LTZ Crew 4WD 2012 Honda VFR 1200F Tahitian Blue (sold) 2015 BMW S1000R Racing Red 2013 Honda CBR500R Red (wife's bike) 2014 Triumph Bonneville T100 2003 Harley Davidson V Rod Anniversary Edition |
#5
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Re: About to break something
The HP numbers seem low, how much boost are u running ?
With scan tool data like "direct scan" we can nip this in bud. I also recomend upgrading to a MAF translator with a LT1 or LS1 maf did you make sure the blow off valve is leaking or stuck open? |
#6
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Re: About to break something
I checked the positive cable by the exhaust and it was stuck to it and burned about half way through. I fixed this and I thought it cleared up everything for a while. It still is sputtering but very little and not nearly as violent. I am SUPPOSED to be running 15lbs of boost but it is not holding (I've seen it try to overboost so I never give it full throttle). I can hold it for as long as I want but when the peddle is on the floor I can see it try to overboost and I can feel the car slow down (I think the computer is pulling timing). I suspect something is up with the blow off valve, it is supposed to be adjustable but even on the "quiet" setting it is very loud. What kind of numbers should I be looking for on the dyno? I have access to one and when I get things cleared up I'll be going.Thanks for the help. I know we are getting off subject and I am re-posting parts of this in the turbo area.
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#7
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Re: About to break something
Quote:
No telling what your power/torque should be. Depends on how well it is tuned. See the 'Performance Recipes' on the web pages for some buildup ideas and tuning combinations.
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Scott Keller - GNTTYPE Founder & Moderator
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#8
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Re: About to break something
Quote:
Blow off valves best purpose would be on a manual gearbox vehicle to hold boost in between shifts.
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Josh 1989 Ford Mustang Turbo 1991 Ford Ranger Turbo 1999 Dodge Cummin Turbo Diesel |
#9
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Re: About to break something
I agree.
But not having it at all means it can't fail.
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Scott Keller - GNTTYPE Founder & Moderator
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#10
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Re: About to break something
i agree. Im not running one anymore. It cause more problems then they are worth on the turbo buick
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