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Koko08

Koko08

Well-Known Member
Joined
Jun 28, 2011
Messages
254
Location
Melbourne
Well anyways my car used to run good and hit 18psi easy smooth ect ect but now it dosent even Wana hit 11psi I'll be lucky to get 14-16psi it really jerky and alot of poping noise my head like rocking hard as a mofo sooooo I thort it was the fuel system so I replaced the fuel pump to a walbro 255lph and fuel filter and still dosent help. So if anyone has ever encounter this problem please help I'm sick of it :/.

http://www.youtube.com/watch?v=R4OxgidGjO4
 
Could it be my o2 sensor or fuel reg because it feels like its not holding pressure it take more cranks but after the first start it start like normal 2-3 cranks and first start of the day take 4-5
 
Sick rvr said:
Could it be my o2 sensor or fuel reg because it feels like its not holding pressure it take more cranks but after the first start it start like normal 2-3 cranks and first start of the day take 4-5
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sound like broken ring lands ae? ive had spark plugs cause something similar an also heard of broken ring lindings causing something similar, maybee a compression test to see
 
Sick rvr said:
Yeah checked them already and plugs are good there on 3k old ngk laser platinum
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Platinum plugs are a waste of cash IMO. I'd still be pulling them to see if they've been fouled...

What plugs are they exactly??? What are their part numbers?

02 sensor won't be doing anything like that. It only tells the mixture readings to the ECU on cruise, not WOT. If it wasn't working, you'd just be using more fuel. You can run no 02 sensor at all if you wanted to.

How long were you running 18psi for before you put the fuel pump in? Did you get it tuned for 18psi?
 
I'm not sure of what spark plug number it is. What is recommended for my car part no. ? And no my car only puff smoke for like 1sec then just flys off. Umm probly a few years at 18psi on stock pump
 
It's running better now ever since I changed and clean the fuel system but something in the back of my head is telling me it's the fpr
 
Yep! Mate same thing has happened to me. It did the whole popping noise n stuff as well... Anyways, turned out it was the leads. What happened was that during the early stages of the when the rubber seals/silicone plug seals started deteriorating and splitting it would only so often make that 'popping' sound as you described in ya post. Now, as your boosting. Naturally your creating more sparks per second say. And thus creating a far higher strike rate for a split lead arch to the cyclinder block instead of ya spark plug. Don't forget the heat your also gonna get when you up'ing it a lil. This coincides with the silicone starting to warp and making it far easier to cause an engine misfire. I could be completely wrong as i'm only go by what i can see/hear on YT. I'm only suggesting it could be this as all the symptoms are very similar to my personal situation. Lol Ask TBORVR on this forum! He was the one that rocked up while i was stranded on the side of the road. That's how bad mine got. But it was a relatively cheap fix. I got my 9mm ignition leads made up by QLD Ignition Leads in Brisbane for around $150 fitted.

Hope this helps mate.

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