Zokus

As stated above, do the secondary injectors operate while cranking? I haven't been able to find a yes or no answer anywhere.

Monkman33

iTrader: (28)

They shouldn't. The primaries are for idle and non boost running. The secondaries kick in once you start boosting.

Zokus

Exactly as I assume, however I've heard conflicting reports from reputable local sources. Hence why I ask.

Wompa164

iTrader: (4)

That's not true, Monkman. It's my understanding that the secondary injectors utilize a staged firing pattern, and are turned on when the duty cycle of the primaries rises above 40%.

Zokus

This was also my understanding, thank you. They aren't used for cold start or anything like that?

j9fd3s

iTrader: (3)

thats a great question. i see no reason why they would be needed for a cold start. be real easy to check with a test light or a voltmeter.

Monkman33

iTrader: (28)

It makes sense that they overlap, however, your primaries shouldn't be over 40% untill your are driving or hitting boost. If you are 40% at idle or a cold start (even with AWS) then you'd probably be running too rich.

I could easily be wrong here as my understanding of the exact stock injector cycles is meager.

NeoTuri

iTrader: (2)

If I had to take a guess, I would say no.

Zokus

According to the PFC commander, the duty cycle is between 2 and 4 % while cranking. Way to low for the secondaries to be opening.

I don't really see them as being a problem, but I had to ask so I can get to crossing it off my list of issues.

Monkman33

iTrader: (28)

If your secondaries were just cleaned, they may be stuck open. Pretty common. Perhaps they got dirty and stuck open? If you are having flooding issues, I would check with your injectors (all 4)

Rx7aholic

iTrader: (22)

Hey everyone claim that secondary only comes on at certain rpm, however just because no body probably investigate further upon startup, the secondary does come on and then balance out. The reason why I doubt anyone did further investigating they just assume like what other claim that t comes on at certain rpm and not at idle. Anyway my car never sinks or smells like fuel after startup and I even disable the double throttle system, until I removed my 850 secondary and replace it with new 1300 and ever since then my car sinks on every startup alot of gas fumes. In addition after it idle out I go for a ride and back and it stop smell. Also upon start up I believe the car runs like above 2500 rpm or more on cars that don't have the double throttle disable.

Monkman33

iTrader: (28)

Your problem is from a poor tuning job and other adjustments not being correct.

AWS is what causes the high idle on a cold start, not the Double Throttle.

And your post would be much easier to read if you at least tried to create normal sentences. Nor being a dick, but slow down and type it out.

And everything I have found indicates that the secondaries should not be running on startup. Again, this indicates that your car is probably suffering from a poor tune.

vc311

iTrader: (1)

wanna find out, disconnect your secondary injector clips and crank your car,youll see it stars up fine

Sled Driver

iTrader: (9)

Short & sweet..................

NO!!!

Proof?

Open your FSM

pg F-74. Engine at idle Primary injectors operate from 1-30%. Secondary injectors OFF.

pg F-164 & F-178. Remarks, Secondary injector not working at no load condition.

pg F-192 & F-194 follow the cart for the secondary injector. the only time it's highlited is during acceleration, not during hunting or fluctuating idle.

pg F-197 says it all. cranking, warm up, deceleration & idle. No secondary injectors.

Your welcome...............

Zokus

Wow, that is top notch! Thank you.

MrNizzles

iTrader: (5)

I should start reading my FSM on the Bart train everyday to work and back. Kinda like how pastors read their bible wherever they go. Yes, we are a cult and pray to the FD gods daily.