Secondaries, Have Question

[davidb]

Secondaries, Have NEW QUESTION

I am having problems with my secondaries. I already have a post about that and would appreciate any advise you all can give me. My new question is: Can the secondaries be controlled manually? Can you wire them to operate by a switch??

Dave

 

[gbizzle27]

Its highly doubtful sence they are controlled by vaccum in the intake.

 

[davidb]

OK, we know that once the motor starts it causes a vaccum that closes the secondaries. To open them a signal (electrical current) is sent by the computer that causes the controller to open and bleed off the vaccum. Right I assume then that this current is sent through the wire that plugs into the unit. So, if you can trick the computer into not seeing 4000 rpm and splice a powered switch into the wires below the plug, will it work! Think about this and let me know what you think.

Dave

 

[pitcrew207]

If you find a way to get them to open sooner id sure like to know..

 

[SeanMc]

If you find a way to get them to open sooner id sure like to know..

LPM/TwEECer.

 

[LOUDSHO92]

If you find a way to get them to open sooner id sure like to know..

Why? You dont need to unless you are running cams.

 

[davidb]

Why I need to!

My secondaries will not open because somewhere along the wirring that leads up to the plug it has been cut or shorted out. I believe they have been cut. Now I can pay the $85 dollars an hour to have the wirring traced out and fixed or I can find some other way to get the secondaries to open. My thought is cut the wires to the plug, splice a switch to them. I will try it if it will work. Anyone ever try something like this or know someone you did. If it wont work I'll just leave it alone and save up some money and get it fixed.

Dave

 

[silversho89]

Id suggest saving up money and doing it the proper way.

And damn, 85 bucks and hour? Is that a dealer or what? All the shops around here are around 50 to 60 and hour. I dont like to use the local dealers as ive heard quite a few horror stories about each screwing people out of money.

Rob

 

[davidb]

You are probably right :shakehead

 

[justin mccluske]

take the vacume lines from the secondarys and plug them into the intake it will only open at wide open throtle

 

[somedude_001]

take the vacume lines from the secondarys and plug them into the intake it will only open at wide open throtle

interesting I didn't even think about that, I was just going to say get a mayns manual and use the wiring diagrams in the back to track down your bad wire, I know it looks intimidating under the hood but once you get use to it its not that bad at all.

 

[davidb]

take the vacume lines from the secondarys and plug them into the intake it will only open at wide open throtle

Thanks, can you explain to me how to do it.

 

[justin mccluske]

theres a line coming from the t that splices the vacume lines from the secondaries ,take that line that also connects to the senser next to the little vacume canister and plug it in to the intake port above the senser/canister .what that does is bypass the canister and senser

 

[davidb]

Thank you, will try until I get the thing fixed right

Dave

 

[davidb]

OK, another question

I did the bypass. Now both sets of butterflies open when the throtle is pushed down, not just at wide open throtle. I am really not sure I like it this way. Takes away from low end but makes a big difference at higher RPMs. Has more of a growl. Car seems to run alittle hotter also. I was told that running the car without the secondaries working will not hurt it. Will it hurt to run my car with the bypass(both sets working more or less together) or will the computer adjust to the increase in air flow? Thanks for any input you may have,

Dave

 

[justin mccluske]

about a month ago my friend had the same problem ,after intence investagation we traced it back to the computer .we put a 94 computer in his 93 and it works great.that bypass does rob a little power off the line but its beater than having them not work at all you also get worse gas milage when they dont work

 

[davidb]

about a month ago my friend had the same problem ,after intence investagation we traced it back to the computer .we put a 94 computer in his 93 and it works great.that bypass does rob a little power off the line but its beater than having them not work at all you also get worse gas milage when they dont work

I just had the car in the shop. They did a whole lot of work to it but could not get the secondaries working. Changed the controler, tested the plug; even changed the computer, nothing worked. I dont mind running the car with the bypass, I just dont want to cause any damage to the motor. We just did the 60K, changed everything. We put a new exhaust, new O2 sensers, ect., ect.
Can the new computer be programed to accept the bypass(more air flow)?

Dave

 

[justin mccluske]

it wont hurt your car if you run it like that , another thing to look at is to make sure your vacume canister next to your senser is hooked up right ,it is a one way vacume if its backwords it will not allow the secondaries to open

 

[Rockledge]

Have you checked for 12V at the secondaries controller? The Red (R) wire should be 12V all the time with key on.

The PCM activates the circuit by grounding it through the other wire (Light Green w/Purple Stripe (LG/P)). So if you have 12V at the Red wire to the controller, then try grounding the LG/P wire to see if the controller activates.

The LG/P wire is connected up to the PCM at Pin # 34 for your ATX, at least according to my '94 Manual, so you should be able to determine whether there is an open or short bewteen the PCM and the controller by testing with a DMM.

If you determine that it's a problem in the wiring harness between the computer and controller, then consider running your own wire.

 

[davidb]

The LG/P wire is connected up to the PCM at Pin # 34 for your ATX, at least according to my '94 Manual, so you should be able to determine whether there is an open or short bewteen the PCM and the controller by testing with a DMM.

My car is a MTX.

Dave