SAFC, Big Primaries, hard starting
08-07-04, 02:36 AM
#5
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Originally Posted by RotaryResurrection
s4's flood so much more that it could be a problem.
Given a healthy s4 and a healthy s5 I don't understand why the s4 would be more likely to flood.
08-07-04, 02:43 AM
#6
No, s5's have a programmed fuel cut feature, and it has even been rumored they have a slight injection delay compared to s4 cars which have neither. Havent you ever noticed that 90% of flooding posts are made by s4 owners, and rarely do s5 owners complain of flooding, even with old tired engines? Mazda made improvements to the s5 to prevent flooding.
08-07-04, 02:49 AM
#7
Hmmm.. As I suspected.
This motor that someone sold me *Supposedly* had 120 PSI, and it was a 20,000 mile Mazda factory reman. Well, once I got it installed and warmed up, it only came up to about 90 PSI. **** a duck.. $1000 down the friggin drain. Been running this motor for a few months, but it has the hot start problem. And all the injectors installed were new, out of the box. 2x720s and 2x890s. God I should know better then to buy used motors by now.
This motor that someone sold me *Supposedly* had 120 PSI, and it was a 20,000 mile Mazda factory reman. Well, once I got it installed and warmed up, it only came up to about 90 PSI. **** a duck.. $1000 down the friggin drain. Been running this motor for a few months, but it has the hot start problem. And all the injectors installed were new, out of the box. 2x720s and 2x890s. God I should know better then to buy used motors by now.
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08-07-04, 12:14 PM
#9
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Originally Posted by J-Rat
Is that comparable to the SAFC?
No, s5's have a programmed fuel cut feature, and it has even been rumored they have a slight injection delay compared to s4 cars which have neither. Havent you ever noticed that 90% of flooding posts are made by s4 owners, and rarely do s5 owners complain of flooding, even with old tired engines? Mazda made improvements to the s5 to prevent flooding.
08-07-04, 07:53 PM
#10
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Larger primaries can cause flooding as start-up, because all factory ECU's use rich mixtures during cranking. The S-AFC can't compensate for this, so the engine can flood.
08-07-04, 08:04 PM
#11
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Originally Posted by gsracer
From being older and probably having less compression?
Given a healthy s4 and a healthy s5 I don't understand why the s4 would be more likely to flood.
Given a healthy s4 and a healthy s5 I don't understand why the s4 would be more likely to flood.
08-07-04, 08:32 PM
#12
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Originally Posted by j9fd3s
s4's have lower compression by 1/2 point in the turbo and .3 for the na's
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