2.8 EST
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From: LeRoy, NY
Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
Re: 2.8 EST
Well the old Dizzy def had issues. I didn't really notice anything inside when I replaced the ICM because its stuffed soo far back. But when I got it out there was more rust on everything and the wires coming out of pickup coil didn't look too good. Def original. See what gets me is the car runs completely fine with EST unplugged. Which is telling me a lot of the stuff is good. Im thinking about running a new white wire from dizzy to ECM. That is the only thing that isn't common to both bypass mode and EST mode. I load tested the wire and it tested ok this is why im not thinking it will help. But i've tried everything else. Do you know what sensors are used to tell the ECM to advance the timing? Ive looked thought every manual I have. I wish I had one on just the ECM and all its logic.
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Joined: Feb 2010
Posts: 42
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Car: 86 camaro
Engine: 2.8
Re: 2.8 EST
the old one i already turned in for core. Here is a pic of the one I purchased http://www.autozone.com/autozone/cat...questid=118666
EDIT: I ran a temp. white wire didn't change anything
EDIT: I ran a temp. white wire didn't change anything
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iTrader: (8)
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From: LeRoy, NY
Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
Re: 2.8 EST
Well, I don't see a secondary pickup coil (like stock) that would confuse the ECM like the CarQuest reman did in class. That PU seems to be working as it is intended to. Also, the wires seem to be on the module in the right orientation (just check to make sure the green wire is on the inside, towards the dizzy shaft).
What are the numbers on the ECMs? All of them. And the 3-to-4 letter code on the chips inside?
What are the numbers on the ECMs? All of them. And the 3-to-4 letter code on the chips inside?
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Joined: Feb 2010
Posts: 42
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Car: 86 camaro
Engine: 2.8
Re: 2.8 EST
So I contacted the person I bought the car off of to see a little more history on it. I guess after he jump started a car he started to have issues with the car. And after replacing everything from cap, rotor, plugs, and alt he found removing the bypass wire the car ran fine. So I maybe pulling at strings here but Im going to pull every ground that I can find and clean them up. Also maybe im loosing power thought the ECM, When it tries to fire off the dizzy the power dropes off and it's soo quick that my meter doesn't pick it up. What do you all think? maybe try this path?
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From: LeRoy, NY
Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
Re: 2.8 EST
That could be it, or not... Next time you run the engine with the EST disconnected, check your battery voltage. Should be around 14V running.
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From: LeRoy, NY
Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
Re: 2.8 EST
When you do the grounds, disconnect the battery and clean those connections, and also the ring on the alternator, and the connections at the starter and the terminal block. The wire from the alternator connects to the terminal block if you can't find it and the stock wiring hasn't been modified.
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Joined: Feb 2010
Posts: 42
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Car: 86 camaro
Engine: 2.8
Re: 2.8 EST
Ya Im going to pull every wire connection and termination this weekend and clean. Then im going to load test every ground going to the ECM. This will eliminate the wiring. But the code on my Chip is AMBF
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From: LeRoy, NY
Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
Re: 2.8 EST
I think that BCC chip code is good... Believe I have one in the garage with that code, or at least have seen one. Anyways, also, don't forget that the 2 major ECM grounds will need to be accessed by actually climbing into the engine bay, because they're on the back of each cylinder head (G112 and G118).
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Joined: Feb 2010
Posts: 42
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Car: 86 camaro
Engine: 2.8
Re: 2.8 EST
AHHH she runs. So I started today thinking I was going to rip apart the entire wiring harness chasing out all the grounds. I opened the hood and started at the battery. Didn't look at the grounds looked at one of the feeds to the ecm, Oh look someone probed the wire. Oh look the wire is pretty much corroded out. Repaired wire thinking that can't be it. Plugged in EST and the car started and ran great No codes. So I decided to check the wiring a little better and found a few more spots that had issues repaired and the car is running great. Installed a new radio rolled down the windows and went for a nice ride enjoying the 55 degree day. Thanks all for the help. I know more about this car then any of my other cars.
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Re: 2.8 EST
Hate to just jump on a old thread but I am near this same situation with a 86 2.8 I have a new ecm coming after a mouse ate all the wires where it comes though the pass fender, ohm tested all injectors, fuel pump new and working. I have redone all the wires with same size and gauge, new ac Delco ICM. Car will fire every time just not run after it fires. Before I install this costly ECM am I overlooking something? I feel like I have confirmed every wire in or on the car via test light or meter.
I have read everything on this for days and it surely appears a grey spot on this car with many a solution.
also do I reuse my prom chips? I would think so but maybe more grey area?
thanks Joel
I have read everything on this for days and it surely appears a grey spot on this car with many a solution.
also do I reuse my prom chips? I would think so but maybe more grey area?
thanks Joel
Last edited by joelsnorton; Apr 3, 2015 at 12:33 PM. Reason: additional questions
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