come on guys check this out
12-18-01, 09:32 AM
#26
Originally posted by Keith
You still have an ACV on your car with no cats? Do you still have the air pump also? I am confused here, since the main purpose of the ACV is to inject air into the exhaust ports or main cat to help the cats do their job. Anyway, there is a third function of the ACV, and that is the anti-afterburn valve. It injects air into the intake when you release the throttle to prevent afterburn during that rich condition. If this valve has frozen/sprung a leak, you will experience the problem that you described. Of course, you need an air pump for this to work.
Irv, Keith's dad
You still have an ACV on your car with no cats? Do you still have the air pump also? I am confused here, since the main purpose of the ACV is to inject air into the exhaust ports or main cat to help the cats do their job. Anyway, there is a third function of the ACV, and that is the anti-afterburn valve. It injects air into the intake when you release the throttle to prevent afterburn during that rich condition. If this valve has frozen/sprung a leak, you will experience the problem that you described. Of course, you need an air pump for this to work.
Irv, Keith's dad
12-18-01, 10:49 AM
#27
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yes i still have the air pump and the acv hooked up because my car is 89 gxl . 89+ rx7 use the air pump to open up the 5th and 6th ports thats why i kept the air pump and acv.
12-18-01, 11:21 AM
#28
Originally posted by prmazdarx7
yes i still have the air pump and the acv hooked up because my car is 89 gxl . 89+ rx7 use the air pump to open up the 5th and 6th ports thats why i kept the air pump and acv.
yes i still have the air pump and the acv hooked up because my car is 89 gxl . 89+ rx7 use the air pump to open up the 5th and 6th ports thats why i kept the air pump and acv.
12-18-01, 11:28 AM
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yes i know it doesnt mean acv is working properly
i was just comenting on why i still had it in some one comented that that i still had it in so i explaned why..
hey you from puerto rico???? i am to but living in houston what part of pr you live in????
i grew up in santa rosa bayamon near the baseball stadium
i was just comenting on why i still had it in some one comented that that i still had it in so i explaned why..
hey you from puerto rico???? i am to but living in houston what part of pr you live in????
i grew up in santa rosa bayamon near the baseball stadium
Last edited by prmazdarx7; 12-18-01 at 11:31 AM.
12-18-01, 11:40 AM
#31
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ok to remove them what do i have to do i know i have to remove the air pump and acv but do i need like a block off plate or something like that???
12-18-01, 11:41 AM
#32
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prmazdarx7-
Let me know if you could hook me up with a deal on an SAFC. Even if it is more than what you pay. I've no problem with paying YOU a profit as long as I can get a deal. If you can't then I understand, but if so that would be great. Just let me know. About the backfiring, I'd do as you said and change out your plugs and plug wires. There's a good chance that your plugs are fouled, especially if you are running rich. Also, if your plug wires have never been changed out, it wouldn't be a bad idea anyway. The person that owned my FC before I did decided he was never going to change plug wires. When I did it, my car ran much better. And like Irv said, the anti-afterburn valve could also cause such incessant backfiring. Make sure it's not bad. Any vaccuum leaks? Clean air filter? Just make sure you check even these obvious kinds of things. Good luck.
-Derek
derek_fullerx@hotmail.com
Let me know if you could hook me up with a deal on an SAFC. Even if it is more than what you pay. I've no problem with paying YOU a profit as long as I can get a deal. If you can't then I understand, but if so that would be great. Just let me know. About the backfiring, I'd do as you said and change out your plugs and plug wires. There's a good chance that your plugs are fouled, especially if you are running rich. Also, if your plug wires have never been changed out, it wouldn't be a bad idea anyway. The person that owned my FC before I did decided he was never going to change plug wires. When I did it, my car ran much better. And like Irv said, the anti-afterburn valve could also cause such incessant backfiring. Make sure it's not bad. Any vaccuum leaks? Clean air filter? Just make sure you check even these obvious kinds of things. Good luck.
-Derek
derek_fullerx@hotmail.com
12-18-01, 11:45 AM
#33
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Also, if you don't have any cats, then your SAP may be a problem. I had mine tied up under the car with a blockoff plate for sometime, before finally removing it and capping off the opening with the rubber cap that goes over the idle adjust screw. What have you done with your SAP? Did you take it off, or what? If it is still on, did you block off the opening? Sorry if you've already answered any of these questions.
-Derek
-Derek
12-18-01, 11:56 AM
#34
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did you remove the dashpot when you did the TB mod? If so this is now out of adjustment and when the TB closes between shifts you get a fuel build up and the a nice back fire. The dash pot keeps the TB open just enough to keep things moving and prevent backfiring.
12-18-01, 11:56 AM
#35
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Originally posted by prmazdarx7
ok to remove them what do i have to do i know i have to remove the air pump and acv but do i need like a block off plate or something like that???
ok to remove them what do i have to do i know i have to remove the air pump and acv but do i need like a block off plate or something like that???
12-18-01, 08:16 PM
#36
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Also, if you don't have any cats, then your SAP may be a problem. I had mine tied up under the car with a blockoff plate for sometime, before finally removing it and capping off the opening with the rubber cap that goes over the idle adjust screw. What have you done with your SAP? Did you take it off, or what? If it is still on, did you block off the opening? Sorry if you've already answered any of these questions
sorry for the ignorance but what is the sap?????
and yes i still have the dash pot in..... can you guys post a link or a picture with some kind of arrows pointing to the parts you guys are talking about i would appreciate it
thanks for the replies and i hope this thread goes on to archives so people like me dont have to ask this again.
12-18-01, 08:18 PM
#37
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as far as a tb mosd the only thing i did to mine was remove the butterflys that all i did to it.. was there something else i had to do to it?????
12-18-01, 10:19 PM
#38
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feel free to coment on any of these threats and put your .02 cents in
i am open minded to anything concerning making rx7 run back to normal or better
i am open minded to anything concerning making rx7 run back to normal or better
12-19-01, 12:13 PM
#39
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The SAP is the split air pipe. It runs from the side of the engine nearest the firewall to the main cat. When you get a mid pipe, there will be no place to connect the SAP. They sell a blockoff plate to cover the end of the SAP, but I didn't want to leave it tied up under the car, so I removed the whole piece and capped of the opening on the engine with the rubber cap that is supposed to cover the idle adjust screw on the throttle body. I can post some pics, but it won't be until the weekend as I'm quite busy with finals, work, etc.
-Derek
If you want the pics, email me and I'll send them asap.
derek_fullerx@hotmail.com
-Derek
If you want the pics, email me and I'll send them asap.
derek_fullerx@hotmail.com
12-19-01, 01:59 PM
#40
Originally posted by prmazdarx7
yes i know it doesnt mean acv is working properly
i was just comenting on why i still had it in some one comented that that i still had it in so i explaned why..
hey you from puerto rico???? i am to but living in houston what part of pr you live in????
i grew up in santa rosa bayamon near the baseball stadium
yes i know it doesnt mean acv is working properly
i was just comenting on why i still had it in some one comented that that i still had it in so i explaned why..
hey you from puerto rico???? i am to but living in houston what part of pr you live in????
i grew up in santa rosa bayamon near the baseball stadium
12-19-01, 02:02 PM
#41
Originally posted by prmazdarx7
ok to remove them what do i have to do i know i have to remove the air pump and acv but do i need like a block off plate or something like that???
ok to remove them what do i have to do i know i have to remove the air pump and acv but do i need like a block off plate or something like that???
)....but I'm sure somebody can help you check it!!
12-19-01, 02:20 PM
#42
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Yeah, No cats, and an airpump, your car will backfire loud as hell. If you remove your airpump, your car backfire will probably for the most part go away. Mine still backfires occasionally but it much more quiet then before. You can remove the Airpump and leave the ACV for now until you get the blockoff plate. The only purpose of removing the ACV is to free up space in your engine compartment and drop a little weight, but you don't HAVE to remove it.
12-19-01, 06:30 PM
#43
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yes i have to deal with emisions but .... i have spmeone to pass test for me hehe. if you notice i have no cats a crapie pacesetter header
2 1/2 in pipe from header back to 3in inlet muffler to 4in tips
2 1/2 in pipe from header back to 3in inlet muffler to 4in tips
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