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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 05-22-2008, 11:32 PM   #1
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Default problems low rpms

Aright just got the car together i went from having a cartech turbo kit on it with a ihi turbo and the manifold was cracked so i changed to a ebay manifold with a evo 16g trubo the car has some sort of engine management on it i unhooked it thinkin it was dumpin to much fuel but then the car wouldnt go into boost the car runs great from 4500 on as soon as its full boost only 9lbs now it did it to when the cartech was on there the guy i bought it off of could never figure out why it did this any ideas on what could cause it to not want to run till 4500
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Old 05-23-2008, 12:12 AM   #2
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It's painful to read your post. Can you please use a bit of punctuation and a little clearer explanation of things?

what did you unplug? do you have a picture?

research "o2 clamp:
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Old 05-23-2008, 12:14 AM   #3
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What you need to do is go back to class and learn how to use punctuation and capitalization. Your **** gives me a head ache. I don't know what I just read to be honest.
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Old 05-23-2008, 12:14 AM   #4
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dammit you beat me.
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Old 05-23-2008, 12:35 AM   #5
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PEOPLE, USE "AN" IF IT IS BEFORE A VOWEL!

I couldn't stand it so I fixed it, maybe someone can help him out now. my sentences are probably too short. But I needed short sentences. after the one he typed. which took up the whole post. one sentence. one post. wtf.

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Alright I just got the car together. It had a Cartech turbo kit including an IHI turbo and a cracked manifold. I changed to an ebay manifold with an Evo 16g turbo. The car has some sort of engine management on it which I unhooked thinking it was dumping too much fuel. (Get a wideband, yo) But now the car won't go into boost. It runs great past 4500rpm with a decent 9psi. (isn't that boost?) It had this same problem when the Cartech turbo was on. The guy I bought it off could never figure out. Does anyone have any ideas?
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Old 05-23-2008, 12:12 PM   #6
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Sorry about not having clear sentances. I wrote that up real fast before i had to goto work i was hoping it was somthing stupid that was wrong with my car and you guys would know. Only thing i unhooked was o2 sensor but the car did this when i bought it. For a little clear explanation when i goto pull out it just doesnt want to go anywhere it feels like your trying to drive a car with a clogged cat. Ill try to get couple pics of it real quick before i goto work today. I had this same problem on one of my friends 240s he we did a sr20det swap in it and it did the same thing. Found that the crank sensor was bad and thats it ran great after that. If you guys have any idea i would appericiate the help.
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Old 05-23-2008, 01:43 PM   #7
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I found this when taking pictures. Nice wiring job
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Old 05-23-2008, 01:52 PM   #8
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Clean up that wiring first. Then I would get a timing gun and make sure the car is timed correctly.
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Old 05-23-2008, 03:14 PM   #9
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Originally Posted by 01TurboMiata View Post
Clean up that wiring first. Then I would get a timing gun and make sure the car is timed correctly.
+1

A friend of mine had a problem with his having no power down low. He found out his timing was set at 8*
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Old 05-23-2008, 07:24 PM   #10
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i had that problem when i still had the afm and before it was warmed up, after it was fully warm it didn't do it. does yours do it all the time?

what injectors are you running? what is your base fuel pressure? is that a stock afm or rx7 afm? how old is your fuel filter? do you have anything controlling timing? what is the timing set to?
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Old 05-24-2008, 12:48 AM   #11
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yes it does it all the time. I have no idea what injectors that are in it. The guy i bought it off of was a complete idiet and knew nothing. i asked him if it has a diff fuel pump or anything "I dont know im not a mechanic" is what he said i was like wow. no i dont have anything to control timing. Im going to put a light on it prob monday i work non stop this weekend. Where should i set the timing to start with. Also im pretty sure its the stock AFM. Is there a color chart for mazda injectors ill also try to see what size they are to i apperciate you guys tryin to help me
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Old 05-24-2008, 10:14 AM   #12
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Quote:
Originally Posted by 90blue16 View Post
Is there a color chart for mazda injectors ill also try to see what size they are to i apperciate you guys tryin to help me
https://www.miataturbo.net/forum/showthread.php?t=4288
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Old 05-24-2008, 10:24 AM   #13
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with your setup you're gonna want stock 1.6 injectors which are blue, or the tan 1.8 injectors. without timing control, set base timing to 6* at 850rpm with ten and ground pins jumpered in the diag box. stock fuel pressure with the vacuum line pulled off should be about 50psi, with your afpr try bumping it up to 55. also show us a clear picture of the label on your afm and we'll be able to tell you which it is.
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Old 05-25-2008, 12:47 AM   #14
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ok ill try to get a pic of that for you on monday if not sooner thanks alot
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Old 05-26-2008, 12:29 AM   #15
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there isnt any tags on the afpr
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Old 05-26-2008, 10:33 AM   #16
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Quote:
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also show us a clear picture of the label on your AFM and we'll be able to tell you which it is.
.....
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Old 05-26-2008, 10:42 AM   #17
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Why did you buy the car if the owner was a dumb ***? Who knows what the car has or what its been threw. He did what he wanted ...... to make it your problem.
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Old 05-26-2008, 12:00 PM   #18
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yea i duno i was hoping it would be a simmple problem then i found the cracked manifold and went downhill from there it was a good deal or wouldnt have bought it
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Old 05-26-2008, 12:15 PM   #19
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How much did you buy it for? how many miles?
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Old 05-26-2008, 10:38 PM   #20
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got it for $2000. It has i think 80000 on it.
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