2G 98 GSX running rich

Joe Ciechowski · Nov 16, 2015

I have a 98 eclipse 4g63 with the stock garret T25 turbo. The problem is that it is running very rich, and every once in a while it will hiccup as if it was missing.

I have tried the following.........

new plugs with correct gap
new coils
new wires
new fuel injectors
new fuel pump
new fuel filter
new fuel pressure regulator
new throttle positioning sensor
new mass air flow sensor

any ideas?

Dsmkauai · Nov 16, 2015

Are you running the stock bov? And is it recirculated properly? Have you done a boost leak test?
And check engine light?

born2race · Nov 16, 2015

Are you running rich at idle and cruising? or only at WOT? How do you know you are running rich wideband? If your o2 sensor is bad it can cause you to run rich

luv2rallye · Nov 16, 2015

If the ECU is not in closed loop mode it will deliberately run rich (to save the engine). Make sure the 2 wire CTS (coolant temp sensor) and front O2 are working properly.

Joe Ciechowski · Nov 17, 2015

I have a 98 4g63 eclipse and cylinder #4 injector went bad on Friday and I put a new one in it here it is 4 days later and the injector went bad again. It has a new fuel pressure regulator and I made sure there is power at the plug.
Any ideas???

tomica93 · Nov 18, 2015

are you sure, you have put a right injector?

is it non turbo or turbo 4G63?

steve · Nov 18, 2015

How are they failing?

Since you also seem to be having other electrical issues, make sure your system voltage doesn't go over 14.4v and check the injector resistor pack to make sure that all of the resistors are in spec at 5.5 - 6.5 ohms per resistor. Check when cold and hot.

tomica93 · Nov 18, 2015

if it is a non turbo then he dont have a injector resisotr pack

steve · Nov 18, 2015

tomica93 said:
if it is a non turbo then he dont have a injector resisotr pack

I know that.

If you look at his other threads he says "I have a 98 eclipse 4g63 with the stock garret T25 turbo"

Joe Ciechowski · Nov 18, 2015

It is turbo and they fail by quit spraying fuel. I checked the plug with a meter and all the plugs read the exact same as one another. The injectors I got are stock injectors from a DSM shop in Pinellas Park Florida. I have not checked the resistor pack yet. Where is that located and how do I go about checking it?

1990TSIAWDTALON · Nov 18, 2015

I know you are a 2g but it will look like this and probably in a similar location Joe. You will need an Ohm meter or multimeter to check the resistance of each one in the pack.

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buhay6 · Nov 18, 2015

tomica93 said:
if it is a non turbo then he dont have a injector resisotr pack

Look at the year of the car "98" 2g with a 4g63 only means on thing, turbo.

Joe Ciechowski · Nov 18, 2015

Ok so cylinder #4 fuel injector went out today again! Which leads me to believe that it is the resister pack. Does anybody know where I can buy a resister pack?

luv2rallye · Nov 18, 2015

Measure the resistance of each resistor in the pack (post 3) before you go spending money buying new ones. Measure with them unplugged. One terminal (all red thicker wire) is common to all of them while the other 4 are connected to each.

Joe Ciechowski · Nov 19, 2015

So test the thicker wire on the pack? Can u use a multimeter for that?

donniekak · Nov 19, 2015

buhay6 said:
Look at the year of the car "98" 2g with a 4g63 only means on thing, turbo.

In Europe all 2g's have the 4g63, even non turbo.

luv2rallye · Nov 19, 2015

Joe Ciechowski said:
So test the thicker wire on the pack? Can u use a multimeter for that?

Unplug the resistor pack. Then use multimeter to measure the resistance from the thicker red wire on the resistor pack to each of the other wires on the resistor pack. Each should be in the range 5.5 - 6.5 ohms.

Joe Ciechowski · Nov 19, 2015

02 sensors are brand new and it has a hks bov. It runs rich at idle and wot. I'm thinking it's the resister pack

GST Jeremy · Nov 21, 2015

did you boost leak test it?

Joe Ciechowski · Nov 24, 2015

So here's what I've done in the past couple of days.
New resister pack
New plugs
New ecu

What I have found though is that when I test the injectors that quit spraying fuel they still click. I tried shooting cleaner through them while clicking them and they don't work still. It's the cylinder on the driver side.

Any more ideas?!?!?!?

Joe Ciechowski · Nov 25, 2015

Yes and there's no boost leaks

steve · Nov 25, 2015

Joe Ciechowski said:
What I have found though is that when I test the injectors that quit spraying fuel they still click. I tried shooting cleaner through them while clicking them and they don't work still. It's the cylinder on the driver side.
?

Assuming a US left hand drive turbo DSM, the driver side most cylinder (next to the timing belt) is #1.

From what you describing it sounds like the are plugging up which is strange for a single cylinder.

Can you post pictures of the bad injectors?

Mauispyder · Nov 25, 2015

When things don't add up, electrical problems become more likely. Intermittent coil pack problem? ECU injector drivers?

Joe Ciechowski · Nov 25, 2015

Just put a new ecu on it and new coil packs. Now cylinder 3 went out today

Spades · Nov 25, 2015

Youve just about covered all the outputs from the ECU all the way down to the injectors. Its time to start concentrating on inputs, such as the MAF causing an over driven injector... especially since its not the same injector failing all the time. Does the car run rich when run or does it fail before getting a chance to even drive it?

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