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Author
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Topic: '97 cobra boggin 5k rpm UPDATE 2/3 *Fixed*
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90GT510
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Member # 9199
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posted
 
 
**Update: Changed spark plugs to copper ones today, runs a lot better but now instead of bogging at 5k it starts bogging at 6k lol**
Like the title says. got a 1997 cobra and it runs great and revs fine in neutral.
Under heavy acceleration the car is fine up until about 5k rpm then it seems to fall flat and lose power above 5000 rpms.
I already cleaned the MAF any idea of what else it could be?
[ 2015-02-11, 01:34 PM: Message edited by: 90GT510 ]
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Stay Sydewayz
Posts: 1725 | From: East Bay/Dallas, TX | Registered: May 2009
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70stang351w
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Member # 9948
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posted
does it still have the irmc valves? could be stuck closed or partial open
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1996 GT VERT /32v MOD - SOLD
1970 Mustang Coupe M-Code 351w
Posts: 1419 | From: 925 | Registered: Apr 2010
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90GT510
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Member # 9199
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posted
quote:
Originally posted by 70stang351w:
does it still have the irmc valves? could be stuck closed or partial open
Gotta check. It doesn't throw any codes btw
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Stay Sydewayz
Posts: 1725 | From: East Bay/Dallas, TX | Registered: May 2009
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SIC9250
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Member # 8216
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posted
Stuck IMRC plates,delete them,or clean them...Or a fast way is to just zip tie them open from the butterly that the cable opens up...
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Coyote_Mach1
Posts: 6959 | From: in the drivers seat. | Registered: Feb 2008
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90GT510
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Member # 9199
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posted
quote:
Originally posted by SIC9250:
Stuck IMRC plates,delete them,or clean them...Or a fast way is to just zip tie them open from the butterly that the cable opens up...
Thanks this is very helpful info. I'll zip tie them tomorow as a diagnosis. If it doesn't take car of the issue looks like I'll have to check spark plugs, wires etc
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Stay Sydewayz
Posts: 1725 | From: East Bay/Dallas, TX | Registered: May 2009
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NonOpSlow2V
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Member # 6111
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posted
Sounds like when my IMRC were stuck closed. Zipped tied both sides and problem was solved. You can delete them and plug the rod holes so air doesnt cross between ports.
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1997 Autumn Orange GT vert
1996 Mystic Cobra
2005 95ci Harley Road King
2011 F150 Raptor
Posts: 2139 | From: San Francisco | Registered: Oct 2005
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90GT510
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Member # 9199
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posted
quote:
Originally posted by Autumnstang97:
Sounds like when my IMRC were stuck closed. Zipped tied both sides and problem was solved. You can delete them and plug the rod holes so air doesnt cross between ports.
Does it throw a code after u zip tie them?
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Stay Sydewayz
Posts: 1725 | From: East Bay/Dallas, TX | Registered: May 2009
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NonOpSlow2V
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Member # 6111
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posted
Not that I recall. You should be good to go.
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1997 Autumn Orange GT vert
1996 Mystic Cobra
2005 95ci Harley Road King
2011 F150 Raptor
Posts: 2139 | From: San Francisco | Registered: Oct 2005
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90GT510
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Member # 9199
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posted
its proving to be a bitch reaching back there trying to zip tie them. its too cold now ill go back and try a little later. I felt where the one on the driver side was. it looks near impossible to reach the passenger side one.
Any tips on where to zip tie and the best way to approach this?
[ 2015-02-02, 07:27 AM: Message edited by: 90GT510 ]
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Stay Sydewayz
Posts: 1725 | From: East Bay/Dallas, TX | Registered: May 2009
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SLOW95GTS
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Member # 10365
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posted
you can always seafoam it, maybe it clears it up.
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1995 Mustang GTS 5.0 - "minor mods"
Posts: 1199 | From: East Bay | Registered: Oct 2010
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90GT510
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Member # 9199
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posted
well I tried and I tried to zip tie that shit today but not luck wasted about 30 mins to an hour total on that shit. its making me just want to pull it apart and clean it.
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Stay Sydewayz
Posts: 1725 | From: East Bay/Dallas, TX | Registered: May 2009
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Sinister Mustang
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Member # 13889
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posted
quote:
Originally posted by 90GT510:
well I tried and I tried to zip tie that shit today but not luck wasted about 30 mins to an hour total on that shit. its making me just want to pull it apart and clean it.
Hey 90GT510,
Sorry this is happening to you, Those IMRC's can be a pain in the butt sometimes. I'd either delete or clean them. Be wary of smog regulations and laws if you decide to delete them though.
- Michael
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Message me for 1979-2015 Mustang Parts!
www.SinisterMustang.com
Posts: 255 | From: Roseville,CA | Registered: Dec 2014
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SacStangDriver
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Member # 8304
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how long has it been since youve done the spark plugs? ive seen these engines fall on their face after 5k from not having a tune up. more than once.
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Need sidework done at great prices? I work on all makes and models from engine work to gears. Check engine light problems too. 916 912 3493
Posts: 1217 | From: sacramento | Registered: Mar 2008
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NonOpSlow2V
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Member # 6111
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posted
If you need help pulling the intake off and deleting them let me know I can lend a hand if you need. I'm in the city.
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1997 Autumn Orange GT vert
1996 Mystic Cobra
2005 95ci Harley Road King
2011 F150 Raptor
Posts: 2139 | From: San Francisco | Registered: Oct 2005
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90GT510
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Member # 9199
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posted
quote:
Originally posted by SacStangDriver:
how long has it been since youve done the spark plugs? ive seen these engines fall on their face after 5k from not having a tune up. more than once.
idk when or what kind of spark plugs it got. I was going to check this after if the zip tying of the IMRC didn't solve the issue.
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Stay Sydewayz
Posts: 1725 | From: East Bay/Dallas, TX | Registered: May 2009
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90GT510
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Member # 9199
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posted
quote:
Originally posted by Autumnstang97:
If you need help pulling the intake off and deleting them let me know I can lend a hand if you need. I'm in the city.
Thanks for the offer. Although I think I can tackle this one, shouldn't be too crazy.
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Stay Sydewayz
Posts: 1725 | From: East Bay/Dallas, TX | Registered: May 2009
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NonOpSlow2V
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Member # 6111
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posted
No problem.
Just take your time and while you're in there you can clean up surrounding parts to detail up your engine bay (if needed).
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1997 Autumn Orange GT vert
1996 Mystic Cobra
2005 95ci Harley Road King
2011 F150 Raptor
Posts: 2139 | From: San Francisco | Registered: Oct 2005
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70stang351w
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Member # 9948
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posted
have you tried sea-foaming it??
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1996 GT VERT /32v MOD - SOLD
1970 Mustang Coupe M-Code 351w
Posts: 1419 | From: 925 | Registered: Apr 2010
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90GT510
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Member # 9199
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posted
quote:
Originally posted by 70stang351w:
have you tried sea-foaming it??
no I have not. will this help at all?
I wouldn't want to piss off my neighbors with seafoam for no reason haha
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Stay Sydewayz
Posts: 1725 | From: East Bay/Dallas, TX | Registered: May 2009
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90GT510
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Member # 9199
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posted
quote:
Originally posted by wheelsonly:
do you have cats ?
Yes
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Stay Sydewayz
Posts: 1725 | From: East Bay/Dallas, TX | Registered: May 2009
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93ReefBlue5.0
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Member # 5780
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posted
miles on the motor? last time a tune up was done? i'd be doing a fuel filter and plugs to start. gapped them @ .054 right? wires and coils as well. start fresh and see what it does.
Posts: 1535 | From: Sacramento, CA | Registered: Jun 2005
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90GT510
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Member # 9199
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posted
quote:
Originally posted by 93ReefBlue5.0:
miles on the motor? last time a tune up was done? i'd be doing a fuel filter and plugs to start. gapped them @ .054 right? wires and coils as well. start fresh and see what it does.
Yes I just did plugs at .054 auto lite coppers. I think I'll be moving on to fuel filter and coil packs (has accel coil packs) and plugs next.
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Stay Sydewayz
Posts: 1725 | From: East Bay/Dallas, TX | Registered: May 2009
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90GT510
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Member # 9199
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posted
quote:
Originally posted by 90GT510:
quote:
Originally posted by 93ReefBlue5.0:
miles on the motor? last time a tune up was done? i'd be doing a fuel filter and plugs to start. gapped them @ .054 right? wires and coils as well. start fresh and see what it does.
Yes I just did plugs at .054 auto lite coppers. I think I'll be moving on to fuel filter and coil packs (has accel coil packs) and wires next.
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Stay Sydewayz
Posts: 1725 | From: East Bay/Dallas, TX | Registered: May 2009
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