Hi, I need some help from fellow forumers. I am getting noises like marbles rattling in my engine during light acceleration. It happens mostly for the next 10 mins of driving after ignition. It sounds like pinging but I see only very light knock readings on my PowerFC commander. Can a faulty CV joint cause this? My right CV joint produces a very similar sound on slow right turns. My mechanic says it could be piston slap caused by my pistons getting up to tolerances while warming up. But I have stock R pistons and a stock B18C5 engine. Anyone can help?

 

Please list all of the modifications you have done to the engine or anything around that area.

 

i see this is your second post with too little information given. The more we know the better we can help you.

 

Piston slap tends to happend with forged pistons not stock cast pistons. If it's coming from the motor, my first guess is obviously detonation. Try retarding the timing and see if that resolves the issue.

CV joints tend to make more of a popping sound vs. marble sounds. Try to determine if the sound coming from your fenderwell area vs. the engine bay. That'll should help narrow it down.

 

Sounds like detonation.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mugen Mike &raquo;</TD></TR><TR><TD CLASS="quote">Sounds like detonation.</TD></TR></TABLE>

if this is the case the plugs may indicate so as well.

 

Why do you have a PowerFC?

Who tuned the PowerFC?

It definately sounds like detonation, because the description 99% of people give for predet is "the sound of marbles in my engine".

 

I'm definitely detonating. I have a PowerFC cause it came with the car. I have a stock B18C5 engine with cam sprockets. I do not know the amount of advance and the tuning was done prior to my taking over of the car from the previous owner. I am getting really bad fuel consumption rate now. I can only go approx. 300km on one tank of fuel. Damn what should I do? I was considering selling this damn PowerFC and getting a stock DC2 ECU. What you guys think?

 

well, either way, you need to find a tuner regardless of you running the power FC or a stock ecu

 

ummm 300 to the tank is about normal.....I drove mostly highway the other day and was very pleased to get 340kms

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmspoonitr &raquo;</TD></TR><TR><TD CLASS="quote">ummm 300 to the tank is about normal.....I drove mostly highway the other day and was very pleased to get 340kms </TD></TR></TABLE>

300 kms is only about 186 miles - that seems a little low to me...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mugen Mike &raquo;</TD></TR><TR><TD CLASS="quote">300 kms is only about 186 miles - that seems a little low to me...</TD></TR></TABLE>

Agreed. Especially since I was getting 300-330mi per tank when I had a stock motor.

Hell, I still get between 260-290mi with the high comp 2.0L.

To the OP: Either find a place that tunes the FC, or buy a stock ECU.

 

Its hard to find a place to tune my FC because almost no one in my area has a DataLogit. And I have been rejected by some tuners due to handset tuning as they find it so difficult. My best bet is to get a stock ECU. I really wonder how much power I will lose with the stock ECU. Can a B16 stock ECU work with my B18C5? Same OBD?

 

From the way you are describing the situation(s) with your current tune, I can accurately say that you will gain power, efficiency and driveability by switching to a stock ITR ECU.

And no, do not use a B16 ECU.

 

Why not reset the Power FC back to the base tune? No way that should detonate assuming you have a B18C power FC in the car.

 

I ran a PFC in my old car and loved it. Easy to use, easy to tune. As Ashai said, restore the PFC to it's original base map. In addition, turn the cam gears back to 0,0.

I have a Datalogit that I'm no longer using. If it will help with the tuners in your area, I'll gladly sell it to you. Let me know.

 

Thanks for all the advises. I guess I will start looking for a DC2 stock ECU and reset the cams back to 0deg. At the moment, I just want my ride to be smooth and fuel efficient. Power is secondary and from the last dyno, it seems the PFC and cam advancement gave me an additional 20hp only. I have another question though. My injector harness is split at its end and I have 4 injector connectors hanging in my engine bay. The previous owner tells me I have H22 injectors on the car now. Why does the injector harness need to be split? Are the H22 injectors of a different OBD? Why can't I use the stock connectors on these H22 injectors?

 

sounds like someones been fiddling with it and they don't know 100% what they're doing

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rino924 &raquo;</TD></TR><TR><TD CLASS="quote">well, either way, you need to find a tuner regardless of you running the power FC or a stock ecu </TD></TR></TABLE>

How are you going to "tune" a stock ecu ?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by garyc17 &raquo;</TD></TR><TR><TD CLASS="quote">Thanks for all the advises. I guess I will start looking for a DC2 stock ECU and reset the cams back to 0deg. At the moment, I just want my ride to be smooth and fuel efficient. Power is secondary and from the last dyno, it seems the PFC and cam advancement gave me an additional 20hp only. I have another question though. My injector harness is split at its end and I have 4 injector connectors hanging in my engine bay. The previous owner tells me I have H22 injectors on the car now. Why does the injector harness need to be split? Are the H22 injectors of a different OBD? Why can't I use the stock connectors on these H22 injectors?</TD></TR></TABLE>

What do you know.... I am selling my stock 98 ITR ECU (OBD2a, no immobilizer) PM me with an offer if interested

 

Will H22 injectors work with a stock B18C5 ECU? That is the only mod aside from the tranny which has been done to my B18C5. I am just afraid it will lean out with the stock ECU.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mugen Mike &raquo;</TD></TR><TR><TD CLASS="quote">300 kms is only about 186 miles - that seems a little low to me...</TD></TR></TABLE>

That depends on how many gallons he puts in the car every 300 km.

If it's 10 gallons, it's low.

If it's 7.5 gallons, it's normal.

 

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

That depends on how many gallons he puts in the car every 300 km.

If it's 10 gallons, it's low.

If it's 7.5 gallons, it's normal.</TD></TR></TABLE>

Always nit-picking, Ken. We're assuming a FULL TANK of gas. 7.5 gallons is not a full tank.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mugen Mike &raquo;</TD></TR><TR><TD CLASS="quote">We're assuming a FULL TANK of gas. 7.5 gallons is not a full tank.</TD></TR></TABLE>

Neither is 10 gallons. Only 13.2 gallons is a FULL TANK.

Fill it just when the warning light starts flickering? Usually around 9 gallons, but can be a bit more or less.

Fill it when it reaches exactly the E line? Usually around 11 gallons, but can be a bit more or less.

Some people consistently fill it when the gauge gets to around 1/8, and probably put in around 8 gallons. Others drive it past the E line and put in 12.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mugen Mike &raquo;</TD></TR><TR><TD CLASS="quote">Always nit-picking, Ken.</TD></TR></TABLE>

Not nit-picking. Searching for truth and accuracy.

 

i don't know why anyone would want to put larger injectors in when there is no demand

but as they are larger, with a stock ECU you'll overfuel even more

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by garyc17 &raquo;</TD></TR><TR><TD CLASS="quote">Will H22 injectors work with a stock B18C5 ECU? That is the only mod aside from the tranny which has been done to my B18C5. I am just afraid it will lean out with the stock ECU.</TD></TR></TABLE>

Will it work? Yes but will it run rich. You'll need to tune them.

But as poster above mentioned, why do you need to upgrade your injectors if your motor is stock? Stock motor should stick with stock injectors.