just installed a b20vtec motor in my integra..i'm having big problems with it now..everytime i try to get on the gas a little bit the car bogs down..but if i'm just gradually doing up the car runs fine...dont know exactly what the problem is....peple are telling me it might be my ecu...i am using my gsr ecu that is OBDI..but i am using a type r intake manifold that is obd II..not sure if that has anything to do with it..people are telling its got to do with my secondary trying to kick in since its a gsr ecu...and they said i dont have one...so is that something that could be making up car bog and feel like it is not getting gas cuz the ecu is confused on why it cna't find the secondary??? so should i just find a obdI b16a ecu and try to use taht one???

 

the best way to do it is hondata
your using an ecu that wasnt meant for that motor
even with a b16 ecu.
a stage 2 hondata will do the trick
gotta remember. this isnt a stock honda motor.

 

I bet you it's the ecu. GSR ecu isn't meant for a single runner intake manifold. If I were you, I'd switch to a chipped P28, or as said above, go Hondata.

But a chipped p28 would be the cheapest route.

 

id also look there first, otherwise it might be that ur using a obd2 itr intake manifold, but i doubt thats the problem...

 

just to add somethign to this guys problems since i am his friend...i was wondering if we can just switch ecu over..like a sohc vtec ex ecu..or a b16a obd I ecu..just in the time being before the hondata gets here???

 

just from left feild - have you checked your TPS?

if it only happens to bog when you hit it, not when you gradually move up, there could jsut be a sensor problem,

but this is jsut a leftfeild guess...

t..

 

ya we checked the tps censor...still can't find out why it wont go..it wants to go when we gun it..its like it hits a wall and just bogs..but u can feel that it wants to tear the street up!

 

Like I said, it's prolly the ecu.

GSR owners who switch over to a Skunk2 manifold will all tell you the same thing.
It bogs after it hits vtec. Only because that ECU isn't meant for the applicationg the you are using.

Find someone with a chipped ecu. Run your car with that. Then come back and tell us what happened.

You can use a B16 (OBD1) ecu, but you might want to add more fuel with a V-AFC or something.

 

KAMiN and fowler are right man. Swap the ecu like they told you. If you want Hondata and can wait a little while than do it because my good friend Rocket along with 2KTEG is going to organize a Hondata group buy if you're interested. HTH.

 

like to thank u guys for the help..i'm in the process of trying to locate a ecu that i can use to see if its gonna work..i'll let u guys know..one more quick question..what if i switch out the intake manifold..and use a old b16a intake manifold??

 

maybe you have the MAP and TPS switches mixed up? double check that. Also...you may want to check your "grounding". too. Sometimes people forget when doing the swap that they go ahead and paint the engine..tranny..and when plug the wireharness back....forget that the paint on the engine/tranny give very little grounding. Just a thought.
[Modified by cinq, 5:31 PM 7/7/2002]

 

ya we checked to see if we switched the tps and the map..that was good..funny you should mention the grounding though..cuz we did forget that..and i was running without it for the first day having the car..then wehn i was looking at my gsr motor..i saw it still on it..then realized it wasn't on the car

 

I ran a stock p28 (95 ex) on my b20vtec to go thru emissions and the car ran perfect. So if you cant find a b16 ecu you might want to try it. It wont run as strong as the b20 is ment to but it might help in the trouble shooting.

 

sorry, jsut interested in clarification,

which ECU wont run the B20 as strong? the P28?

i am planing on using a first gen PR3 ecu to control my B20VTEC, with a veiw to chipping it, if required...

this OK? which would be best?

TIA,

t..

 

which ECU wont run the B20 as strong? the P28?

The stock p28! It is ment for a sohc vtec motor not the b20vtec

The pr3 with a chip will be fine so would a chipped p28.


I am running a mugen chipped pr3!
As for which is best I think which ever you can get a good deal on


[Modified by rolow, 3:37 AM 7/8/2002]

 

cool, ta,

(sorry i didnt know the P28 - i hear people talking alot about chipped P28's, must be a civic ECU?)

im going to use the stock PR3 with higher fuel pressure for starters, and see how the A/F's look on a dyno...

then consider Hondata if the fueling is un-workable (which i am not sure it will be...),

comments?

t..

 

I don't think a stock pr3 will cut it on a b20 vtec! I dont think?

 

dont swap your ecu.. its not that.. and dont get a hondata also, its not worth not for the amount of mods you have only. It will only cause you headache while a ecu with a v-afc will work just as well..

it sounds like yr a/f ratio is off.. do you have a fuel pressure regulator, if not, I would get that.. and raise your fuel pressure slightly.. and see if yr throttle response is better.. after that.. get a v-afc and tune it.. with your STOCK ecu regardless of gsr or b16a or chipped P28. A gsr ecu will run fine with a single stage butterfly manifold, dont let anybody tell you otherwise. I have had many friends run gsr ecu, myself included at a time.. and had absolutely no problem.
One thing.. if you plan on sticking with an ecu and running a piggyback.. the more you do to your motor (high compression.. etc) the more you want to use a stock ecu or a ecu that has a program that is STOCK because of the conservative timing maps. Keep that in mind. My motor is running on a stock ecu also.

 

it bogs only because a gsr ecu is set at 4400 rpms, but easily fixed with a v-afc. Not something you need to swap an ecu for..

 

any reasons why?

maybe the injectors will be close to maxing out...

what else?

 

sounds like a misfire...what kind of spark plug wires are you using? try swapping out the spark plug wires and/or spark plugs and tell us what happened. this exact thing has happened to me before.

 

it's definately ur ECU, it's looking for a IAB to send a signal to...what you need to do is buy a p28!

I have a po5 forsale ($50.00), and it can be chippped by KATMAN to DOHC VTEC Specs!

vnt

 

well i am getting a p28 ecu tomorrow..so we will see what that will do..hopefully it will solve everything...if not..i dont know what is wrong

 

got the ecu..p28..didn't really work that great at all

 

can you outline the problem again? is it the same?

the car 'bogs' when you hit the gas? like its getting too much fuel? or not enough?

do you have an ajustable FPR? how is that set?

waht is your fuel system like? big or stock?

do you get any CELs?

t..