Cobra Intake problem

sgwinn · 06-01-2007, 06:33 PM

I just put on a new Cobra intake on my 90 essentially stock motor. Nothing else was added but the intake. Well, it runs pretty well, but there is a noticable bog when you first start out. Used to be i could nail it in first on a rolling start and it would have perfect acceleration. Now, it bogs and then takes off; but even when it takes off, it does not seem to have the same torque that it did before when it was fully stock. Is that because it needs a bigger throttle body to let more air in? Idle is perfect and runs great at constant highway speed. thanks

Dark_5.0 · 06-03-2007, 12:46 AM

The cobra intake is actually a very good intake for low end torque so it should not make your car bog.

Go back over all the basics. If you pulled the distributor to remove the intake make sure the timing is set where it is supposed to be. Also check your TPS voltage.

tmoss · 06-03-2007, 09:18 PM

Actually, even though the cobra is a good intake, it is not as good for low-mid range power )idle~3,500 rpm) as the stock intake. I am not surprised at all that you noticed the loss, but the bog is not normal and indicates you have a problem to find. Once corrected, some of the loss you feel may come back.

sgwinn · 06-03-2007, 09:24 PM

thanks. Buddy of mine thought a new chip reprogrammed to add more fuel at lower rpm might work.

tmoss · 06-03-2007, 09:39 PM

Don't waste your money on a chip right now, it's not the issue and it is rather expensive.

Dark_5.0 · 06-03-2007, 11:34 PM

Back when I had a stockish motor with an explorer intake which is basicly the same thing as a cobra intake I didnt notice any negatives just positives.

By changing only the intake. I went from a stock intake to an explorer intake and went from a 14.79 @93mph to a 14.46 @95mph.

The bog/loss of low end torque is not intake related IMO.

sgwinn · 06-04-2007, 11:16 AM

thanks. you had said to also check the TPS voltage. what is that and how do I check? forgot to mention that i also had the heads cleaned up, shot peaned, mangafluxed and valves cleaned and new guides. could something in the head not be synched up right causing the hesitation? thanks.

USMC302 · 06-08-2007, 09:28 PM

Sounds like timing to me, what's it set at right now? All the chip is gonna do is bump your timing anyway,

sgwinn · 09-11-2007, 11:52 AM

Figured it out. Stinking gasket was not the right one. started hearing noise like the fan belt was old, dried out and squeaky. had it replaced (needed to anyway) and noise was still there. took it in and they diagnosed the vacum problem and determined which gasket was causing the problem. (had to take the intake off to tell) ordered the correct intake gasket, replaced, and no bog at all. runs like a champ.

tmoss · 09-11-2007, 11:59 AM

good deal..........now enjoy it........

sgwinn · 09-12-2007, 12:09 PM

yessir. will do. what next/ cam and heads? big bucks however.

USMC302 · 09-12-2007, 09:34 PM

LOL, best time to do the cam was when you had the intake off....

06-01-2007, 06:33 PM	#1
sgwinn Registered Member Join Date: Feb 2001 Posts: 84	Cobra Intake problem I just put on a new Cobra intake on my 90 essentially stock motor. Nothing else was added but the intake. Well, it runs pretty well, but there is a noticable bog when you first start out. Used to be i could nail it in first on a rolling start and it would have perfect acceleration. Now, it bogs and then takes off; but even when it takes off, it does not seem to have the same torque that it did before when it was fully stock. Is that because it needs a bigger throttle body to let more air in? Idle is perfect and runs great at constant highway speed. thanks __________________ 1990 LX 5.0 Cobra Intake K&N filter ET 15.0 Yokohama ES 100. Cobra R 17's DynoMax SS's Pro 5.0 More to come

06-03-2007, 12:46 AM	#2
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	Re: Cobra Intake problem The cobra intake is actually a very good intake for low end torque so it should not make your car bog. Go back over all the basics. If you pulled the distributor to remove the intake make sure the timing is set where it is supposed to be. Also check your TPS voltage. __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

06-03-2007, 09:18 PM	#3
tmoss Registered Member Join Date: Mar 2003 Location: Saint Louis, MO Posts: 634	Re: Cobra Intake problem Actually, even though the cobra is a good intake, it is not as good for low-mid range power )idle~3,500 rpm) as the stock intake. I am not surprised at all that you noticed the loss, but the bog is not normal and indicates you have a problem to find. Once corrected, some of the loss you feel may come back. __________________ Tom (Torque) Moss 88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE). http://www.fastlanecars.com/

06-03-2007, 09:24 PM	#4
sgwinn Registered Member Join Date: Feb 2001 Posts: 84	Re: Cobra Intake problem thanks. Buddy of mine thought a new chip reprogrammed to add more fuel at lower rpm might work. __________________ 1990 LX 5.0 Cobra Intake K&N filter ET 15.0 Yokohama ES 100. Cobra R 17's DynoMax SS's Pro 5.0 More to come

06-03-2007, 09:39 PM	#5
tmoss Registered Member Join Date: Mar 2003 Location: Saint Louis, MO Posts: 634	Re: Cobra Intake problem Don't waste your money on a chip right now, it's not the issue and it is rather expensive. __________________ Tom (Torque) Moss 88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE). http://www.fastlanecars.com/

06-03-2007, 11:34 PM	#6
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	Re: Cobra Intake problem Back when I had a stockish motor with an explorer intake which is basicly the same thing as a cobra intake I didnt notice any negatives just positives. By changing only the intake. I went from a stock intake to an explorer intake and went from a 14.79 @93mph to a 14.46 @95mph. The bog/loss of low end torque is not intake related IMO. __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

06-04-2007, 11:16 AM	#7
sgwinn Registered Member Join Date: Feb 2001 Posts: 84	Re: Cobra Intake problem thanks. you had said to also check the TPS voltage. what is that and how do I check? forgot to mention that i also had the heads cleaned up, shot peaned, mangafluxed and valves cleaned and new guides. could something in the head not be synched up right causing the hesitation? thanks. __________________ 1990 LX 5.0 Cobra Intake K&N filter ET 15.0 Yokohama ES 100. Cobra R 17's DynoMax SS's Pro 5.0 More to come

06-08-2007, 09:28 PM	#8
USMC302 Registered Member Join Date: Apr 2001 Location: Gallatin, Tn Posts: 1,326	Re: Cobra Intake problem Sounds like timing to me, what's it set at right now? All the chip is gonna do is bump your timing anyway, __________________

09-11-2007, 11:52 AM	#9
sgwinn Registered Member Join Date: Feb 2001 Posts: 84	Re: Cobra Intake problem Figured it out. Stinking gasket was not the right one. started hearing noise like the fan belt was old, dried out and squeaky. had it replaced (needed to anyway) and noise was still there. took it in and they diagnosed the vacum problem and determined which gasket was causing the problem. (had to take the intake off to tell) ordered the correct intake gasket, replaced, and no bog at all. runs like a champ. __________________ 1990 LX 5.0 Cobra Intake K&N filter ET 15.0 Yokohama ES 100. Cobra R 17's DynoMax SS's Pro 5.0 More to come

09-11-2007, 11:59 AM	#10
tmoss Registered Member Join Date: Mar 2003 Location: Saint Louis, MO Posts: 634	Re: Cobra Intake problem good deal..........now enjoy it........ __________________ Tom (Torque) Moss 88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE). http://www.fastlanecars.com/

09-12-2007, 12:09 PM	#11
sgwinn Registered Member Join Date: Feb 2001 Posts: 84	Re: Cobra Intake problem yessir. will do. what next/ cam and heads? big bucks however. __________________ 1990 LX 5.0 Cobra Intake K&N filter ET 15.0 Yokohama ES 100. Cobra R 17's DynoMax SS's Pro 5.0 More to come

09-12-2007, 09:34 PM	#12
USMC302 Registered Member Join Date: Apr 2001 Location: Gallatin, Tn Posts: 1,326	Re: Cobra Intake problem LOL, best time to do the cam was when you had the intake off.... __________________

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