Engine Pinging At 13psi

[silviline]

hey was at the drags on sat night i had my boost at 13 psi on my rb20. this is in my silvia with standard ca18det fuel pump. my af ratio guage was reading rich under full load . any ideas . im thinging not enough fuel any thourghts??

evan

[illusiVe]

intake temp too hot or not enuf fuel IMO

[silviline]

im thinking more on the fuel side

might be time for a pump upgrade:)

[TommO]

Could be fuel... the AFR guage isn't a true representation, esp if they are made to run on N/A cars where the AFR's are a lot higher than a turbo car as well.... Have you checking your timing? Stock ECU?

[silviline]

stock ecu havnt checked timing yet does any one no the timing degrees ect????

[FATGTS-R]

Im confused, you say it was reading RICH but you have concerns of a lean fuel issue?

But as mentioned, dont rely on the A/F gauge especially if its just hooked up to the factory fitted sensor. Next time its on a dyno look at the a/f ratio the dyno sniffer shows compared to what your one is showing. You will be amazed, like I was at how useless it was and throw it in the bin.

[limpus]

First things first...get rid of that ca18det pump...those things are really old and should be the first thing to go...i won't be surprised if everything runs well after u replace it...

[silviline]

First things first...get rid of that ca18det pump...those things are really old and should be the first thing to go...i won't be surprised if everything runs well after u replace it...

<{POST_SNAPBACK}>

well yeah the pump is going , but she still hooks up ok

[paulr33]

wideband or stock 02 sensor ?

[Trust33]

all of the above.though these things are expensive.It's the little things.