I want to fix my car that is emitting rich black smoke.
- Thread starter sands9330014
- Start date
We need facts, normal is a generalization, actual numbers, compression numbers, house numbers, fone numbers, number of pets, you get the idea.
Really need to know if the valve were adjusted properly. Are the rockers the stock pedestal style or are they stud mount?
The head is standard. Compression is 9 psi on all cylinders.
Attachments
I installed a thermostat and am slowly bleeding the radiator coolant. There is still some black smoke, but it seems to be getting better. There is still some hunting, but it is still there. When I checked the codes, kore26 came up again. I think it is the MAF, but the engine stops when I remove the coupler. The MAF is clean.
9 psi is really low to the point I almost don't believe the number, maybe 90? Have you done leak down tests on all the cylinders?
Being that you're in Japan (according to your profile)
Are you saying it's 9 bar...not psi...?
That would equate to about 130psi
It was 130 psi. I also performed leak down testing using the LANG CLT-2. Yesterday, I finished bleeding the engine coolant and started the engine. I don't feel any major problems when idling, but when I step on the accelerator, black smoke comes out. After that, I did the kore test again with the scanner, and the numbers came back at 26 and 42. I don't know why. The MAF and O2 sensors have been replaced.
Mcmahst
5 Year Member
Lots of us on this site have found even brand new parts can be bad. Maybe find a MAF sensor from a trusted source and retest. It can be very frustrating working on these cars when brand new parts aren’t good.
Have you check the ten pin or salt and pepper connectors for good connections from the injector harness to the main ECU harness? These are the large connectors behind the upper intake. You may need to close the female connectors and open up the male connectors to get a better connection. The O2 sensors run thought these connector and they have been known to cause issues.
As you can see the O2 and other sensors run though them and can cause all kinds of issues if the connections are not good.
As you can see the O2 and other sensors run though them and can cause all kinds of issues if the connections are not good.
Mcmahst
5 Year Member
And if we’re talking about wiring, make sure the two grounds for the O2 sensors are attached to the back of the engine. Those grounds are critical for O2 functionality.
Thank you. Is the earth ground for the o2 sensor the wire attached to the back of the right head? If so, it is attached, but if the earth ground is not connected, will the KOEO test show code 11? KOEO will show 11.
Thank you. Yes, I am thinking that the replaced sensor may have been defective, but I am wondering if the only way to check is to buy it again.
This looks like the info I received when I checked into the " lifetime" warranty on my Lowes bar be que......
Mcmahst
5 Year Member
I believe there are TWO grounds on the O2 sensor harness, one on each cylinder head. If I’m wrong, others will correct me.
IIRC the ground wire (only one) is the orange (?) wire in the injector harness and bolts to the intake (factory) or it can be bolted to the passenger side head, there is a ground wire that goes from the back of the drivers side head to the firewall, this is for the gauges.
Similar threads
