FPR faulty?

[nicole_]

When my 9 was dyno'd a few months back, we found that it was down on power and the AFR was quite odd, mainly after vtec

I really dont think it was my engine, but it definitely had an issue...

With the car having a huge overhaul and new engine, I'm wondering if it might be worth changing the FPR. A few people have mentioned this could be my issue, and I dont really want the same thing happening again when it's all back together.
Just wondered if people had any experience with a faulty FPR and if it's worth changing - and what the symptoms were if anyone's experienced this.
Or am I chasing the wrong thing here? lol

 

[JohnTurbo]

You can rule out your old bottom end. Nothing wrong with it.
Fpr or fuel pump are likely!

 

[Vtec6000]

I have never seen a stock FPR go bad. Your engine is running rich up top but I see this quite often with the stock ecu. What kind of torque was the engine making?

 

[nicole_]

Good to know John! im glad

I have never seen a stock FPR go bad. Your engine is running rich up top but I see this quite often with the stock ecu. What kind of torque was the engine making?

80 peak do you have any ideas?

 

[Vtec6000]

Is that torque at the hubs or flywheel estimate? What breathing mods had you on engine?

 

[Beetlejuice]

Is that torque at the hubs or flywheel estimate? What breathing mods had you on engine?

I'd say it'd be a pretty fair assumption that it's not torque at the hubs - strange question for a tuner (correct me if I'm wrong) to be asking after seeing that graph..
Going on by the figure of 80lb.ft shown on the graph - were that torque at the hubs, flywheel torque would be <20lb.ft - it wasn't exactly the healthiest B16b, but it certainly wasn't throwing out "ride on mower-esque" torque figures!

 

[Vtec6000]

I'd say it'd be a pretty fair assumption that it's not torque at the hubs - strange question for a tuner (correct me if I'm wrong) to be asking after seeing that graph..
Going on by the figure of 80lb.ft shown on the graph - were that torque at the hubs, flywheel torque would be <20lb.ft - it wasn't exactly the healthiest B16b, but it certainly wasn't throwing out "ride on mower-esque" torque figures!

Yes bit of a brain fart on my part! Torque does seem rather low, especially on high cam/vtec.

@nicole_ What breathing mods?

 

[nicole_]

Errm dc2 intake, vibrant 421, decat and 5zigen pro racer
You could tell when you drove it that it wasn't right, was dynoed last year and print out reflects a healthy normal b16b. I can't remember what it was like when I first got it but remember it feeling slow and not as quick as I expected from the first track day in it a month after I got it :/

 

[Vtec6000]

Was the cam timing checked at any stage? Also distributor timing?

 

[nicole_]

Was the cam timing checked at any stage? Also distributor timing?

Nope nothing, I knew the car was coming off the road and having an overhaul, so with no direction on possible problems I just kinda hoped I'd fix it while things are being replaced. But now I'm thinking more it may not be resolved if its something I havent changed.

 

[excaliburcombo]

One of my friend also have this kind issue. Before done top overhaul the AF ratio OK (3k rpm - 6k 13 AFR) and high rpm 12.5 AFR. After complete doing top overhaul on same dyno after VTEC the AFR going crazy rich (11.0-10.5 AFR). The only thing he change was Ignition Coil and need to turn max distributor to get 16 degree timing.