Today i went to Dyno Spot racing to have my car (89 civic d16z6 turbo) dyno tuned. Best pull was 162.7hp 149.2 tq made with homemade turbo set up with tdo5-14b turbo. Problem is in all the pulls at about 5500rpm car throws code for map sensor power drops off . Iam using a V-afc to tune the fuel. To try and fix this problem at the dyno place had them install a check valve. Dynoed no check engine light but power was like 122hp. Installed 2 more check valves to see if it would help , no check engine light but still low 130hp. So took the check valves off and dynoed and got around 155hp but now getting check engine light for map sensor again. Any suggestions or ideas on how to get the car to stop throwing map sensor code. its obdo using d16a6 ecu. would converting to obd1 help . ANy help is appreciated thanks

 

ttt

 

Why not use a missing link instead of check valves. It's supposed to be a lot better than check valves.

 

why not spend a lil more money and do the vafc hack. get some used dsm's and do that. search for vafc hack

 

i am using the v-afc hack and i have dsm 450's , but thanks for the suggestions. Anyone dyno with a missing link?

 

my map sensor goes off when I run bloody rich. it happens to me a few times.

 

jeeez CJ at least be more complete with the set up

CAR-89 civic si

motor- D16Z6

management-

PM6 ecu, stock 89 civic si ecu

DSM 450's
Apexi Vafc

turbo seet up

STD manifold, adaptere plate

14B turbo
3inch downpipe and exhaust , no cats

2 inchh chargee ppes,

starion intercooler

ACT clutch.

and CJ, put up your fuel settings !!!!!!!!!

 

Thanks Phil "Turbo FAB master"

fuel settings-Wide starting at 1,000rpm going to 8,000rpm 35% 48% 44% 40% 46% 50% 50% 50% Low is 30% 40% 40% 40% 45% 50% 50% 50%
vtec engages at 4800rpm

 

why are u using check valves with the afc hack???? the afc hack takes away the use of those silly little things called check valves......

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RexSiT3 &raquo;</TD></TR><TR><TD CLASS="quote">why are u using check valves with the afc hack???? the afc hack takes away the use of those silly little things called check valves......</TD></TR></TABLE>


;cars wieerd. itt likes to throw a map sensor code and go intto major limp mode. thats why we tried out somoe check valves.

 

You're running -50% on the AFC when it throws a code?? How much boost are you running?

 

8psi

 

maybe an old and tired map sensor? you said obd0?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SDT Project EF &raquo;</TD></TR><TR><TD CLASS="quote">8psi
</TD></TR></TABLE>

That doesnt make any sense. The MAP voltage reduced -50% on the AFC should clear 8psi with no problem. I guess your car is like my GSR... doesn't like the hack

 

thanks for the advice and help. oh and how did you get around this problem with your gsr?

 

thanks and ttt

 

how bout swapping a fresh MAP sensor? maybe your map sensor is about to die..

 

Ok today i switched maps sensors with my brother. He has a 1993 integra ls. The sensor was a little bit different but looked just about the same. I drove the car and for like 3 or 4 pass shifting through grears letting it rev to like 6,500 no check engine light like it used to when it hit 5,500. Then i let my friend drive it and i rode with him. He pushed the car a little harder shifting at 7,000rpm and the check engine light comes on first for vehicle speed sensor then a little bit later for the map sensor. What could be the problem now?

 

ttt heheheh im just too hardcore when i drive and throw codes

 

So the new MAP sensor allowed you to see more boost w/o a CEL?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VTC_CiViC &raquo;</TD></TR><TR><TD CLASS="quote">So the new MAP sensor allowed you to see more boost w/o a CEL?</TD></TR></TABLE>

I guess?