I really need some help from HT tonight. My gsr swap in my em1 has gone crazy. I drove my car on friday and it ran fine....then saturday night I decided to take it out and everytime I hit Vtec the car feelt like im hitting a rev limiter. It boggs and loses power. I have no idea what is going on....a couple things I did already have been to clean the vtec solenoid filter, I check my plugs...not sure why, I ran lucas fuel injection cleaner. I unpluged the vtec and the car feels like a weak ls motor. I have ran out of personal ideas. I need help from some guru's. I hoping some one has had some experience with this problem. Thanks

 

help me guys

 

do you have enough oil in the car?

 

bump cuz i got no ideas

 

is your motor stock? if not try getting fuel pressure regulator and if u have upgraded cams get cam gears.

 

it probably not building enough oil pressure to engage vtec. do an oil change and see what happens, if nothing, u might need an oil pressure guage to find out exactly how oil pressure ur getting. just an idea.

 

did you make sure all your electical connections are correct? what ecu are you using? i hope you are using a gsr ecu, because if not then the secondaries in the intake manifold will not open up, and that may be causing you to bog. at what rpm does vtec engage on your engine? on a stock gsr vtec engauges at 4500 rpm and the secondaries open up at 5500-5700rpm. laters

 

Thanks for the replies. I am running a gsr ecu(p72). Since I did my swap about 15k ago the car has ran fine until know. Vtec engages at 4500 but then boggs horribly. I have enough oil in my motor. I checked that too. All conectors seem to be pluged up. Im going crazy I just dont understand. Any more tips? My motor is completely stock. If that helps...

 

bad gas..?

 

vtec wont engage on a cold motor...had a friend that ran with no thermostat and his vtec never engaged cuz his motor got to operating temp...just a thought for u

 

My car is getting warm.

 

I had the same problem. Mine ended being a plugged cat. I noticed my header glowing red. Took the cat off and started it up. Revved to about 9k.

 

my vtec bogs at high rpms in any gear above 3rd.. maybe i'll check if my cat is plugged also

 

somethin like ur cat.. and are you running 91+ octane?.. sounds like that's what the problem is to me. other then that. no clue

 

Did you guys (THugluv423 and seejay) Check your oil levels? Without enough oil your vtec won't engage.

 

My oil levels are fine. I always run 93 octante. I hope its my cat. I highly doubt it thought. My car is only six years old. Also if my o2 sensors arent working would my cat get plugged up?

 

It could be the cat? My car would lose power in higher rpms, sputter and just fall flat on its face. Found out it was the cat. Bump for some more ideas tho.

 

-Todd- its me Carl with the red si from chatt state. Im coming down to Tn this weekend may say you around in that Ls. holla at me bro. Oh so anyway you think I should change the cat?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by THugluv423 &raquo;</TD></TR><TR><TD CLASS="quote">-Todd- its me Carl with the red si from chatt state. Im coming down to Tn this weekend may say you around in that Ls. holla at me bro. Oh so anyway you think I should change the cat?</TD></TR></TABLE>


Where you at now? What are you doing these days? I dont know about changing the cat, id wait till I got some more advice on here before you listen to any advice I have to give... haha I was on Amnicola a couple months ago and I took it up to redline a couple times and I noticed my car bog and had no power, it would also dive and sputter when I would pull out, I drove it home and the car did all it could to keep up with traffic on the interstate... Later found out the cat was stopped up.

 

get a timing gun and check your timeing..you might have threw it off somehow.....

 

Ill try pull the cat off in the morning and see if that helps. Ive been hearing from people that my cat could be the problem. Ill see.

 

i had the same problem in my old hatch the vtec would sputter real bad it took a while to find the problem it was a bad connection from 2 of my injectors check those if they used butt end connectors cause sometimes they give out and its best to have them soldered on for a better results.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by The Tech-1 &raquo;</TD></TR><TR><TD CLASS="quote">Did you guys (THugluv423 and seejay) Check your oil levels? Without enough oil your vtec won't engage.</TD></TR></TABLE>

oil llevel is cool... soo i'm hoping it's my cat

 

alright...im a little impatient and i didnt read any of the other posts but i had somewhat of the same problem...

-check your dizzy wires... i had one pin that was loose which caused it to sputter when going in to higher rpm's.
-check all the wires that going into your ecu... i had two wires that broke the weld and it caused my vtec to stop functioning.
-check your oil filter... this was the first problem that i ran into. i had a smaller oil filter on (ls) and when i changed it to a vtec filter (gsr) vtec started to work fine.

just a few things to check...

 

i have a gsr and p72 ecu and my vtec kicks in at like 6000-6500 :-/ but it use to lose all power when vtec kicked in...found out it was wireing problems so check all your wires