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Old 03-28-2009, 10:16 PM   #1
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Default car boggs 5krpm ++

ok so here i go again. First the specs:
1992 miata 1.6l
greddy turbo kit 9psi
rx7 afm
bipes acu set at 12deg base timing 6 deg when full boost
supra 305cc injectors
6:1 vortech afpr
190hp walbro fuel pump
custom 2.5 cat back
fmic and bov

well my car currently started to bogg/hesitate from 5k rpm to redline and it had been working fine on the set up i have. I did some research as i know you hate noobs that dont take the time to do so before posting. I changed my spark plugs and wires, played with the afm but i still get the same bogging. I think it might be running too rich cuz imy idle sounds a little gargly but thats how it sounded before. i dont have a wideban cuz im too broke right now. SO i have run out of ideas. I have some theories like my coil went to ****...clogged cat(its sock) or my car just sucks...lol so throw me some ideas to troubleshoot and sorry for the long post.
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Old 03-28-2009, 10:51 PM   #2
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for sure you'll be running way too rich in boost with a 6:1 disc on a 190hp pump with 305cc injectors. at idles who knows, get a wideband
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Old 03-28-2009, 11:27 PM   #3
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thanks for the reply...but im broke but thats the next part im buying i guess just wait till my next paycheck. do you guys think running without the afpr will help...or im just going to put the 1.8l miata injectors and see how that works ive read that they are good up to 9psi right?
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Old 03-28-2009, 11:38 PM   #4
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leave the afpr in, though a 3:1 is probably a lot closer to what you need. Without a wideband it's like walking around in a house party naked, blindfolded, with your erection in your hand.
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Old 03-28-2009, 11:44 PM   #5
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Have you pulled your plugs to see if they are black, sooty, and shitty? This would be a good indicator of rich assuming you already went 2 ranges colder on your plugs.
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Old 03-29-2009, 02:18 AM   #6
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i bought the ngk's bkre7 and yeah when i checked the plugs cylinder 1 and 2 were pretty black but the other two cylinders were not, they seemed to have normal wear. I dont think the ngks are two steps colder but what other spark plugs are colder.
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Old 03-29-2009, 06:00 AM   #7
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Quote:
Originally Posted by miata5 View Post
i dont have a wideban

Don't post again until you have one. Diagnosing bogs or hiccups without a wideband installed is so futile and useless you may as well ask a psychic what's wrong with your car. Get a wideband, tell us what it's doing, and we can help you.
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Old 03-29-2009, 09:45 AM   #8
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Quote:
Originally Posted by Savington View Post
Don't post again until you have one. Diagnosing bogs or hiccups without a wideband installed is so futile and useless you may as well ask a psychic what's wrong with your car. Get a wideband, tell us what it's doing, and we can help you.


+1 to what he said. I still dont get how anyont would yurbo and drive their car without one. You need to get one asap.
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Old 03-29-2009, 01:54 PM   #9
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lol alright...im going to buy one but i was looking at the aem uego wideband and its expensive is there a cheaper alternative.
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Old 03-30-2009, 12:12 PM   #10
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Originally Posted by miata5 View Post
lol alright...im going to buy one but i was looking at the aem uego wideband and its expensive is there a cheaper alternative.
As a temporary fix, you could find someone doing a cheap dyno day, and put your car on the dyno. It'll have a high quality wideband, and you can see your entire AFR.
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Old 03-31-2009, 01:56 AM   #11
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well i just took the 305cc injectors out and put the 1.8l injectors in and shazaam everything worked fine. i guess i wont be putting those in till i get a wideband and some sort of engine management. so thatnks for the help
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