White Rotary

Quick recap:

Car was running perfectly fine 2 months ago. It has been sitting in the garage during the winter and it started right up after 3 months of sitting. I drove it a for a week, and then everything was fine, I red line the car a few times and it rev smoothly. Problem starts when I failed my e test.

I tried to tune up the car by changing plugs, wires, and air filter. But when I put back my wires, I forgot one and I started the car with 2 leading and 1 trailing. It started no problem, but after less than 15 seconds I remember about the last wire and I stop the car. Oh well, because of the start and stop in such a short time, I have a flooding, so I de-flood the car and it started.

The nightmare started after de-flooding. I took it for a drive around the block and car feels lack of power, and wouldn't rev much. I thought may be I was in limp mode. I stopped the car and I realized my cat was glowing orange. There goes my first cat, I replaced the cat with another one, because I thought the old one was just broken and I thought that was the reason why my cat glow in orange.

After melting my second cat, I realized that was not the reason. I have posted another post about "Can't take the UIM off". I spent some times taking the UIM off and then serviced all 4 injectors, replaced the UIM gasket, cleaned up grounding on top of the rotors. ... Long story short, a member told me to check spark and then I realized both my leading and trailing for the front are not getting any spark. Only L2 & T2 are getting spark.

I am just trying to trace back what I have done could led to this issue. Car was running fine before, and now it is only getting spark for rear rotor. I have checked the CAS by the plugs, and the resistance is within the spec. I also tested the coil, leading and trailing have about the same resistance, 0.08 vs 0.09. I switch the key to "on" position and tested the pressure sensor and made sure there are power to both coils.

At this moment, I am stuck again.

re-rx7

iTrader: (3)

Did you reconnect the ground that sits on top of the engine?

misterstyx69

iTrader: (142)

Get the color code for the wires going to each injector and see if your "T2 and L2" are not what they are supposed to go to.
I am thinking that it could actually L1 and L2.

It would make more sense..as L1 and L2 fire simultaneously.

re-rx7

iTrader: (3)

^ what he said.

White Rotary

I am not following what you meant.

re-rx7

iTrader: (3)

Check you injector wires and make sure they are going to appropriate injector.

satch

iTrader: (1)

You mean spark plug.

re-rx7

iTrader: (3)

White Rotary

I took the plugs out and test the spark, so I shouldn't have mixed up leading and trailing.

The T1 and T2 are spark tested with the trailing coil behind the strut tower.

The L1 and L2 are spark tested with the leading coil beside the battery.

I did the test separately. I laid the L1 and L2 spark plugs with the wires on top of the intake manifold and then used a breaker bar to hold the position and the I went inside the car and crank. Same procedures for T1 and T2 spark test.

However, I only get L2 spark when the leading spark test was performed; and I only get T2 spark when doing the trailing spark test.

White Rotary

As I did more search, I found it more confusing.

According to what I have found. Leading coil should spark together, there is only one signal wire to the coil and I should see both L1 and L2 spark together, but I didn't.

satch

iTrader: (1)

As far as lead coil is concerned it could be a poor ground as the coil needs to not only be bolted to the fender but the contact point must past the muster as far as a good ground being present. Try switching the L1 wire to the L2 coil bore and the L2 to the L1 coil bore and try the test again. Secondly, just perform one wire test at a time.

re-rx7

iTrader: (3)

Do you have a spare Coil lying around?

misterstyx69

iTrader: (142)

NO..I mean INJECTOR wires.
He took the manifold off and serviced the injectors.
IF he screwed up the order to where they are supposed to go to then this is what is happening.This leads me to the glowing cat thing.

OH..not talking about the sparks here,.,talking about the extra gas(sorry to sway from the subject)

cudadude_72

iTrader: (1)

My car had a bad ecu... might be the case I just bought the whole ignition setup. The ecu was the first thing I replaced and it fixed the problem. Spent weeks trying to figure out the problem too.

White Rotary

Thank you Satch. I have actually tried to switch L1 and L2 wires, but same thing happen. I could try to test them separately and see if there is any differences.

I have two sets of wires, one old and one new, so I know for sure the issues are not with the plugs or wires. As I have swapped them all all combination, but I didn't try testing them separately.

satch

iTrader: (1)

You also might want to jumper the battery from a running car to make sure the car has enough juice to fire the coils properly.

White Rotary

I just tested the car as per the way you describe, but same result.

I only plug one wire onto leading coil and I can only see spark from L2, but not L1.
I am using the same wire and plugs.

White Rotary

I think I will try with ECU next. When your ECU gone bad, was there any symptoms before hand. My car was running all fine and then this happen after I deflood and remove the UIM.

satch

iTrader: (1)

Did you try regrounding the coil?

White Rotary

I have redone the 3 main ground as per Aaroncake's website.

Is there a specific round for the coil? If so, I probably have not done it. How would I do so?

satch

iTrader: (1)

You unbolt the coil from the fender and sand both mating surfaces which make contact. Just focus on the lead coil for now.

White Rotary

I did and it still wont spark on L1.

KompressorLOgic

iTrader: (6)

try another coil? perhaps something is internally damaged inside the coil pack

re-rx7

iTrader: (3)

This. Get another coil and see what happens.

White Rotary

Thank you guys!!! AMAZING!! Thanks for answering all my questions in the past couple months.. I have learned alot.. and still learning..

I see all 4 sparks again! Thanks for a friend lending me his coils to test everything out. I have never expected both of my coils died at the same time. Also, the ohm test was fine.. Anyway, it is running again !! CHEERS