Exhaust Indicates a miss

carfanatic89 · 03-15-2008, 08:01 PM

87 7mge. My car is driving me crazy, I love the supras, but mine is hard to keep on the road and keep puting mustangs in there place lol. But anyway my car when at Idle about 800-1000 RPM It missed but not enought to kill itself and you can only really tell by the exhuast, but thats not good enough for me I want it to run really smooth. At any other RPM It sounds fine and I have no loss of power. What do yall think it could be. BTW I have a different exhuast system could that throw off the A/F mixture. The exhaust also has a really strong gas smell.

supradaddy0803 · 03-16-2008, 09:43 PM

Well there is a lot of questions to be asked here. If you smell gas then you are running rich. This could be caused by it actually missing and one of the cylinders just throwing the gas right back out of the exhaust. As for your exhaust it shouldnt throw off the A/F it will make a difference on HP though if you dont have enough back pressure. I would check you distributor cap rotor check the spark on the spark plug wires and check your plugs. If it is missing as bad as you say then when you pull out one of the plugs it should smell like raw gas. this would be your missing cylinder. If you havent replaced the wires or the cap and rotor I would just go ahead and do it. LOL I think I have a new cap sitting around I never got around to putting on my 7M before the swap they are only like 12 bucks. Also check your timeing with a light may be off but more than likely it is your plugs or wires or cap. My on 7M used to do that when I first got it. Or when I get a chance I could drop by Waco and help you out and we could go spank those Mustangs in my 1JZ beater lol they will never see it coming.

carfanatic89 · 03-19-2008, 10:31 AM

ok thanks i have 2morrow off so I should be able to check it out the plugs, wires, and rotor. I really want to put the jz1-gte twin turbo, but thats big thing to do and this is my daily driver, $$$ also helps lol. I passed this 05' mustang I was racing on the highway at 120 lol he never ever saw me comming, couldn't keep up either lol.

03-15-2008, 08:01 PM	#1
carfanatic89 3" Exhaust Join Date: Apr 2007 Location: Waco Posts: 164	Exhaust Indicates a miss 87 7mge. My car is driving me crazy, I love the supras, but mine is hard to keep on the road and keep puting mustangs in there place lol. But anyway my car when at Idle about 800-1000 RPM It missed but not enought to kill itself and you can only really tell by the exhuast, but thats not good enough for me I want it to run really smooth. At any other RPM It sounds fine and I have no loss of power. What do yall think it could be. BTW I have a different exhuast system could that throw off the A/F mixture. The exhaust also has a really strong gas smell. __________________ Supra Engine Powered Dragster

03-16-2008, 09:43 PM	#2
supradaddy0803 12psi boost Join Date: May 2006 Location: Athens, TX Posts: 308	Well there is a lot of questions to be asked here. If you smell gas then you are running rich. This could be caused by it actually missing and one of the cylinders just throwing the gas right back out of the exhaust. As for your exhaust it shouldnt throw off the A/F it will make a difference on HP though if you dont have enough back pressure. I would check you distributor cap rotor check the spark on the spark plug wires and check your plugs. If it is missing as bad as you say then when you pull out one of the plugs it should smell like raw gas. this would be your missing cylinder. If you havent replaced the wires or the cap and rotor I would just go ahead and do it. LOL I think I have a new cap sitting around I never got around to putting on my 7M before the swap they are only like 12 bucks. Also check your timeing with a light may be off but more than likely it is your plugs or wires or cap. My on 7M used to do that when I first got it. Or when I get a chance I could drop by Waco and help you out and we could go spank those Mustangs in my 1JZ beater lol they will never see it coming. __________________ 1987 supra NA 5 speed 1JZGTE swap Tokico Illumina 2 and Eibach springs Tokico pillow blocks Suspension Techniques front and rear sway bar HKS super dragger cat-back exhaust plus test pipe Greddy Profec B spec 2 boost controller HKS type 1 turbo timer Supra sport solid steel drive shaft Walboro 255 fuel pump JZA70 Front end mod 18" Volk Racing AV3 18x8.5 front 18x9.5 rear

03-19-2008, 10:31 AM	#3
carfanatic89 3" Exhaust Join Date: Apr 2007 Location: Waco Posts: 164	ok thanks i have 2morrow off so I should be able to check it out the plugs, wires, and rotor. I really want to put the jz1-gte twin turbo, but thats big thing to do and this is my daily driver, $$$ also helps lol. I passed this 05' mustang I was racing on the highway at 120 lol he never ever saw me comming, couldn't keep up either lol. __________________ Supra Engine Powered Dragster Last edited by carfanatic89; 03-19-2008 at 10:33 AM.

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