Hey all,
I am in a drastic need of help. I installed the sc on my car two weeks ago, after watching my wideband I noticed the afr durin wot after vtec was lean (about 13.8). - tried putting in a intake restrictor and it didn't help. - drove it gently until last night. I noticed0my car was running like shit. Vtec no longer worked so I knew it was an oil issue, I looked and the drain plug fitting was leaking, I replaced the oil and no vtec, took off the sc belt because the car started running real lean.I do not know whaqt the issue is. I measured the pulley it was a 3.6 so I know that I need more fuel a.k.a aem ems and injectors. I have a fmi and the only code I am throwing is the damn air pump P0410. .y car is still running very weak, no vtec, but idles fine, and no wierd sounds from engine. - had the fpr maxed and have a walbro 255 which is pretty damn loud is that normal?

 

You are running a 3.6inch pulley with no EM? That is a recipe for disaster. I suggest you get that car to a tuner ASAP with a proper EM system, ID injectors and hope you have not fried your motor. Yes the 255 fuel pump is loud.

 

I know its a disaster the guy I bought it from ran it fine, but I haven't drove it hard at all, when you say fried how would I check this? I am getting the aem ems and 1000cc injectors but can't get on a dyno for 2 weeks, if I messed up the engine it wouldn't idle fine and there would be a knock or something wouldn't there be?

 

ok now that i am at a computer ill try and explain everything a little better. when i installed the sc on the test run we noticed that the afr's during vtec at wot hit 13.8 and i let off the gas. since then i have driven very conservatively and barely even hit vtec. about a week ago i threw a cel and went to autozone to read the code. it was the secondary air pump (relief that it wasnt something else) i continued driving but yesterday my afr's went crazy. when i was trying to get onto the interstate right when vtec hit the car went 17+ afr and fell flat on its face i released the gas as soon as i could. Now my vtec stopped working so i pulled over and realized that the sc had a small oil leak from the drain plug fitting. I removed the sc belt in fear of damaging anything more. Replaced the oil and still no vtec? does vtec not engage if the sc belt is removed? There is no wierd noises, the afr's at idle are between 14.6-15.3 and stay consistant. During normal driving the afr's are pretty normal but i dont have vtec and this is where i am stuck. I feel that the engine is ok, but i will not put the belt back on until i figure this out. I am getting an AEM EMS and bigger injectors for the car. what injectors do you recommend? could it be the fuel pump? FPR? i am having almost the exact same problems ad moddiction is in his thread. HELP ME!!

 

STAY OUT OF WOT until you get tuned!! Drive the car lightly!! Also I don't that Vtec works when you have a CEL. does your car run lean with the belt removed??

 

Bump I need some help, I know that I have to drive very very cautious. That is why the sc belt is no longer on until I figure this out what size and brand of injectors should I get? I am buying the aem ems

 

bosch 900 or id1000 FTW

 

I ran without a belt when I drove to my friend's shop. Although it sounds safe, he mentioned to me that its actually very bad to run without a belt because the oil is running through the charger and if its not spinning..hot oil is pretty much just stuck in there. I think it is better to run it with the belt and stay in vacuum. Just a FYI..

 

well installed 4" pulley and soldered all fmu connections, still same issue minus the vtec. WOT it still hits 16.9 in vtec AAAAHHHHH! no more vtec for me! also, if you are going to say that a 4" pulley needs ems and injectors, remember i am running a fmic so i dont need that. i guess the next choice is going to be a new fuel pump? maybe my brandnew walboro is faulty? i guess its not un-heard-of. Any ideas? Anybody??

 

Even a 4" pulley without injectors and a standalone EMS is a disaster.

I'm at a 4.8" pulley, and the car may be able to go 1psi more than that...if it's not cold out.

STOP TRYING TO HIT VTEC You don't have the fuel to do it.

With your FMIC you *might* be able to run a smaller pulley, but I think you're still pushing it with a 4". Also, it's pretty bold to say you don't need injectors or an EMS when you're totally leaned out Did the kit not come with the Comptech air-liquid intercooler? That is far more efficient than a FMIC, especially in this application. The FMIC is fine to show off, I guess, but it's not the optimal solution.

So, you say you soldered the FMU? Are you sure you aren't talking about the ESM? (if it doesn't have 20 wires, it's the ESM). All it does is clamp the MAP sensor voltage...that's all it does. A FMU would actually adjust fuel, but Compech's box doesn't. SOS' does, though.

Do you have the rising rate fuel pressure regulator installed? The "falling on its face at 6K" is exactly what would happen if the fuel pressure regulator wasn't installed, or the vacuum line for it wasn't going to the manifold. It works by having a bladder pushed down, increasing fuel pressure as manifold pressure increases. The FPR is a big, red, circle thing that your fuel would be running through.

You really can't diagnose the fuel pump until you look at fuel pressure. Installing a pressure gauge you can see from the inside of the car is a pain...it's best just to tap the rail (or temporarily mount one like in the FAQ). Until you can verify pressures, you can't diagnose the pump. And you can only diagnose on a dyno.

Also, do you have the Walbro 255 or 255HP?