I just installed a hypertech thermomaster chip in my 87 IROC 305. Now the car has less power,the check engine light is on, the car idles at 1500RPM and it wont comunicate with my scan tool. I put the stock chip back in and the car runs perfect. The car has a 160 stat, 185 fan switch, adjustable fuel pressure regulator set at 50PSI, headers no cat and a Borla 3" exhaust. Any advice?

 

Yep, send it back and get your money back. GM is the authority on how to program the ECM's for their cars, not hypercrap.

 

yes but does GM offer any higher performance PROMS? I havent seen any if they do. Somebody has to make a decent chip that does what its supposed to.

 

Yes, GM did, the chip that came in your vehicle.

 

GM put a high performance chip in their cars?

 

I had a hypercrap chip in my car, it made it ping so now I use it to pee on, send it back and get the things to burn your own chips, you will learn so much about your car and how to tune it for the same price as the chip. see the diy prom board for more info.

 

I like my ZX-12R. Plug the laptop in, change the fuel and ignition curves.

 

Yes, they did. About all you are going to get by burning a chip for a stock engine is some knowledge and maybe 1-2 mpg better mileage, Gm did about all that could be done with the cal for stock engines.

 

I find that very hard to believe. Do you work for GM or something? I think your giving the GM engineers WAY to much credit

 

you said it brotha, our cars were tuned for gas mileage and emissions, not performance, and who on this board keeps their car stock? theres much to be desired for our cars tuning across the board especially WOT. mine runs way lean all the time and could use a quicker timing advance at part throttle, thats why Ill be burning chips asap (actually probably a lot of swearing and hating chevys for a while as I figure it out, then tuning)

 

YOU'RE giving them way too little credit. Go ahead and burn your chips for a stock engine, let us know how much better than all of those engineers and tuners you were able to get it (and pass emissions too, those are a part of a lot of people's lives)

You'll at least gain some knowledge and experience with chip burning. Or just go buy a hypercrap chip and see how much better they are than the GM engineers.

 

It's possible that they sent you the wrong chip.
The debate on off the shelf chips is neverending but either way your check engine light should not come on. I would call Hypertech or whoever you bought it from.
I am one of the few people that saw a gain from a Hypertech chip and I backed it up with actual track runs. My car had a cold air intake and an aftermarket muffler at the time so it wasn't completely stock.
So many people on here are quick to quote what a few others opinions are when in reality they have no experience with it themselves.

 

Hypertech chips are garbage, period. U want proof, come on by and ill load up both bins for u and u can compare them for yourself. Take a walk over to the dyi-prom board here and start reading , we're all going faster, whether stock or modified than we were with anything gm had to offer us :-) All it takes is a lot more time and knowledge thna money to get started and working your way to an undeerstanding of what/how it works

There are custom chips(custom tuners who will work with u too) out there that work decently for stock cars and yes they were tuned for mileage and emiisions first and then performance, the big 3 have to do it that way.

Hypertech, Jet, and any of the other 10 sec 20hp advertisers out there are smoking it out their tailpipe and we have all seen it and proved it over at the prom board

Later
Jeremy
PS those hypertech fan swithces? i will sell u them all day for only 20$, i can get them at carquest for ohhh a whole 10$ i think :-)

 

Almost everyone on the DIY board is burning chips for decently to seriously modified cars. It is a HUGE challenge to learn how to do that which is why so few people are actually doing it.

The bottom line is that for a stock car the Hypertech chip is better than the stock GM one. Is it worth the money? Not to you because you have the equipment and I assume you know what you are doing.
Is it that much different than the factory one? Probably not. From what I hear they only added a little bit of timing at higher RPMs and not much else. How is that considered garbage though to someone that doesn't have the equipment or knowledge to do it themselves?

With the few mods this guy has he doesn't need to start learning how to burn his own PROMs quite yet.

 

I guess since 'we've all seen it on the prom board ' then it must be true. Don't get me wrong I'm not saying that Hypertech makes a better chip than a custom one because they are not custom chips. They are designed for stock to nearly stock motors and they ARE better than the factory ones.
I proved this at the racetrack, not on the internet.

 

Did you do a scan of your ECM on your 1/4 mile runs? You'd probably be shocked by what you see. Adding timing and a little more fuel at WOT is NOT the way to go, you need hard data on what is happening with the engine before just slapping in more fuel and timing.
If you ran faster with that chip...bully for you, but your engine is probably suffering from it too.

On a side note, tuning these engines to meet EPA guide lines is what makes the power, a clean burning engine makes more power. Look at the little V6's being made today, they meet very strict emissions laws and crank out well over 200 hp doing it....hmmm clean=power

 

There is no end to this one.

 

https://www.thirdgen.org/newdesign/articles/chips.shtml

I found this on the board!!!!

 

What "GM Performance" chips are they talking about? I don't read that as stock.

 

I called hypertech today the tech i talked to sounded like some moron hillbilly. he said I must have got the wrong chip. but the part number matches right up. I'm just gonna send the worthless POS back to Summit racing and run the stock PROM untill I build an 350 at which time I will try to burn a PROM or maybe go to a DFI or FAST system. Thanks for all the input.

 

How would my engine suffer?
My point is ONLY that it ran faster with the Hypertech chip when my car was nearly stock.

 

If you really want to run a chip on your stock motor, run the ed wright fastchip
FASTCHIP

 

I gained 2-3 MPH by running the ARAP code which is from a 1989 Automatic Corvette on an otherwise stock '89 L98. I ran my stock chip and then flipped over to this on the same day at the track and that was the difference.

I also have improved my part throttle response, gas mileage(enabled highway mode), start up crank time(2-3 cranks vs 6-8), fan temperatures(on at 208 off at 204), and learned alot.

Now that I am swapping heads and installing headers I can adjust to the new flow numbers.

Burning your own chips is the best value for your dollar period. Aside from the performance you may gain, the knowledge will help you understand your engine in greater detail so when the time comes to actually upgrade some components making the most of them will come in very handy.

Morly is right that a clean running engine makes power. And overall GM did a great job, but a massed produce vehicle usually meets the lowest common denominator thus tuning for your exact conditions and modifications, even small ones, does maximize the efficiency of the engine, thus making more power.

All this should be done with a proper scanning tool and logging features so that all changes can be measured.

 

I just wanted to add my 2 cents, HYPER TECH IS CRAP! They should give some KY jelly with that buttf*&^ing.

 

I just wanted to add my 2 cents, HYPER TECH IS CRAP! They should give some KY jelly with that buttf*&^ing.

 

Does the highway mode really work? Why didnt they enable this on GM?

 

Yes Highway mode really does work easy 2-3 mpg more some times even more. The reason that GM did not envoke it in all of their chips, depended on the year and emission requirements.

When highway more is envoked it produces more NO.

 

They highway mode should work. I haven't had a chance to measure it in mileage because I barely did 100 miles since I've enabled it, but my datalog of some of those miles shows that it goes into highway mode and leans out the AFR to 15.1:1-15.4:1.

Now I still need to enable Highway spark mode as well, but I am installing Vortec heads as we speak so I will first retune for idle and past throttle, then highway and hopefully by then I will have procured myself a wideband O2 sensor and start tuning for WOT!

 

Isnt highway mode enabled when you turn on cruise control?

 

No...certain conditions need to be met for Highway mode to be enable and in the programming of the original chip certain conditions will never be met.

Such as Min. RPM for highwat spark mode : 6350

That's a tad higher than my normal cruising speed!!!

 

6350! I dont think my engine goes that high, I know Ive never checked, I dont think the gas mileage is going to help much at that speed, which for me would be about 300mph, heh