Ses light Heibeck Chip and Secondaries Question

[QB93Z]

If you have a misfire or stumble problem you may want to investigate the injectors. If they are original 1991 injectors they should be replaced. When you have the plenum off, measure the resistance of each injector.

BTW, I fixed the "T" in your user ID.

Jim

[Torchred96]

Jim, thanks for you input and fixing my T Those injectors are just going to be replaced. I don't really see the point of checking them if they have that kind of mileage on them. right? I can then forget about them for a good while. Edit: I understand that it's shotgunning the problem, but what I mean is, I don't have any history on the car and I don't want to be thinking every time I hear a stumble that I shuddah when i couldah..

Kevin mentioned that I might be able to remove the broken key, so I gave it a try and succeeded. I don't know why, but it was a plastic flat key with no teeth, only a groove on both sides. So, I guess I now need to find another key. Thank you Kevin!..saved me a couple hundred there from what I see on ebay. OR, will I even need it with the chip...

Paul, thank you for that in depth response:
Okay, when I had the Haibeck chip in, I would get a ses light. I still haven't pulled the codes as I've been doing some odd jobs on the car. e.g. took out the key from the valet switch, fixed antenna and I took out the Haibeck chip with the intention of sending it back to him for a recalibration with the secondaries removed. I put the original prom back in (in the meantime) and now have no ses light...maybe it takes a while to resurface. Still have the stumble and lack of power..I'm assuming that the stumble is the injectors and will tackle that soon.

Can I keep the power key operational with the haibeck chip when the secondary throttle valves are removed or does that chip just bypass it? My thoughts are that in the normal power mode only eight injectors work and in the full power mode, all 16 will work all of the time...Am I off base here? I like that little switch. Makes the car unique-er


I'd like to do this all at once, injectors, porting plenum and IH's and elimination of secondary throttle valves et al and chip. I got the car cheap enough and it was taken care of very well as far as I can tell. I'd like to continue the care, only make it more reliable/powerful in the process.


sorry for the rambling, but this car has me going nuts....in a very good way. Love to talk about it, look at it, fondle it...etc etc. Well, I'm sure I'm preaching to the choir though.

thank you

[Kevin]

if you want the car to default to on you can get a chip burned to do so. It sounds like someone used the emergency door key in your power key switch and it broke off. With the key on you run on 8 injectors until you hit ~3,000 rpm's then everything wakes up, Mark's chip, I think, defaults to on but you can use the key to turn it off. If you still want to talk about the secondaries feel free to call me.

[Paul Workman]

Originally Posted by Kevin

With the key on you run on 8 injectors until you hit ~3,000 rpm's then everything wakes up, Mark's chip, I think, defaults to on but you can use the key to turn it off. If you still want to talk about the secondaries feel free to call me.

Well, not a zackly...

Marc's calibration will default 91-95s to FULL POWER for running sans secondaries. Only at idle does it run on primary injectors. Soon as you go to 1% or more throttle, the secondaries come on and the dwell time is adjusted such that twinned the injectors provide proper fuel for closed loop operation.

I'm not sure on a 91-95 if Marc's sans secondary program will even allow you to switch back to "NORMAL" power setting. This is due to the fact the fueling calibration depends on both injectors operating and (on a 90 for sure) if for any reason the secondary injectors shut off (e.g., a sudden SES light) the secondaries shut off and the mixture goes waaaay lean! When that happens, you're instantly in limp home mode. So, even if you could switch back to NORMAL (which you can on a 90 - a no-no if running w/o secondaries), you wouldn't want to if you could. (Something tells me if it is possible to lock it out of NORMAL that he prolly does that for you. Maybe he'll jump in and clarify his setup a bit more.)

And, since the secondaries are on all the time except at idle, the 3k threshold for secondary opening (one point along a the throttle position curve) does not apply.

P.

[ugo85r]

Hi,i have a problem with heibeck chip, i remove secondary and change injector ,secondary fuel pump,fuel filter,fuel pressure regulator, test all sensor (map-vacum-oil temp-cts),i test 2 secondary solid state relay,i change ECM and o2 sensor...but i always got a code 61 and intermitent code 55.Fuel pressure is ok.i'm going to change spark plugs wire and spark plug !!! i'm french(exuse me for my bad english !), and nobody know zr1....is somebody have an idea ???I do not know any more what to look.
Thank

[Torchred96]

ugo, I can't be of much help. Although I took my Haibeck chip out and the codes went away, my car had injector issues, secondary issues etc etc etc.. I sent the chip back to Marc for some additional programming for the secondary delete and a few other things and explained what was happening. Marc put the chip in another zr1 he had in the shop just to be sure it wasn't the cause of my problem.

I havent put the chip back in as I am waiting to get the gremlins taken care of first.
Im sure someone here will fix u up. good luck.

[Kevin]

Originally Posted by ugo85r

Hi,i have a problem with heibeck chip, i remove secondary and change injector ,secondary fuel pump,fuel filter,fuel pressure regulator, test all sensor (map-vacum-oil temp-cts),i test 2 secondary solid state relay,i change ECM and o2 sensor...but i always got a code 61 and intermitent code 55.Fuel pressure is ok.i'm going to change spark plugs wire and spark plug !!! i'm french(exuse me for my bad english !), and nobody know zr1....is somebody have an idea ???I do not know any more what to look.
Thank

have you contacted mark?

[Marc Haibeck]

If you are using my chip with the modification to the chip to remove the control of the secondaries, the secondary port throttles need to be removed or mechanically propped open. Also the vacuum line to the secondary vacuum sensor must be removed. If the vacuum line is connected, a code 61 will set when the main throttle is opened past idle. The secondary vacuum sensor on 1990 to 1992 cars is located under the bracket that holds the ECM.

If the car is driven under load with a Check Engine light on. The engine will run lean and set a code 55 because the secondary fuel injectors are locked out.

If you want to work around a broken valet key, all that you need is my basic performance calibration chip. It sets the Full Power mode on by default when the car is started.

Best of luck.

[ugo85r]

I remove vacum line and let sensor to atmosphere and i forced secondary open.
Ok i understand for code 55.
I think the valet key is good ( i look on the tech1).But i will test tomorow.
Thank for your answers !

[ugo85r]

Originally Posted by Marc Haibeck

If you are using my chip with the modification to the chip to remove the control of the secondaries, the secondary port throttles need to be removed or mechanically propped open. Also the vacuum line to the secondary vacuum sensor must be removed. If the vacuum line is connected, a code 61 will set when the main throttle is opened past idle. The secondary vacuum sensor on 1990 to 1992 cars is located under the bracket that holds the ECM.

If the car is driven under load with a Check Engine light on. The engine will run lean and set a code 55 because the secondary fuel injectors are locked out.

If you want to work around a broken valet key, all that you need is my basic performance calibration chip. It sets the Full Power mode on by default when the car is started.

Best of luck.

so i have a bad one information which block the passage in full power ?
if i understand with this chip the car is in full power all the time ? even if one of parameter too have the full power is bad ?