99 Boxster Ticking Tap noise
12-21-2018, 02:10 PM
#31
Lot of info. Well before I started working on the car I drove home from seller for 2 hrs w CEL on ....drove good maybe a little power loss. CEL wound up being Vario Cam....checked Solenoid had bad resistance ,so I changed it. Long story short I only started getting the misfire codes after I buttoned everything up. So I assuming its something I did. Maybe I'll start with exhaust leak and then simply swap out IRIDIUM plugs for OEM. That's one thing that changed. Any suggestions how to proceed is appreciated. Thanks V
12-21-2018, 05:49 PM
#34
Race Director
Lot of info. Well before I started working on the car I drove home from seller for 2 hrs w CEL on ....drove good maybe a little power loss. CEL wound up being Vario Cam....checked Solenoid had bad resistance ,so I changed it. Long story short I only started getting the misfire codes after I buttoned everything up. So I assuming its something I did. Maybe I'll start with exhaust leak and then simply swap out IRIDIUM plugs for OEM. That's one thing that changed. Any suggestions how to proceed is appreciated. Thanks V
Or start by swapping out the plugs. I know in one case -- with a Cayman -- the owner used some other plugs that a compatibility chart indicated were suitable replacement for the factory plugs. The engine misfired. The plugs -- he posted a picture -- had the recessed tip. The exposed tip of the Porsche factory plug is intended to run hot at low speeds to keep the plug clean but to run cooler at high speeds to keep the plug from running too hot.
He replaced the plugs with the recessed tip with the correct factory plugs with the extended tip and the misfires went away.
Might be too much to hope for that a plug change will have some miraculous effect on the engine but you have to start somewhere.
12-21-2018, 05:55 PM
#35
Yeah I think1 I'm gonna go for plug swap 1st....maybe I'll get lucky. NGK BKR 6EK correct? Put it this way...the car wasn't misfiring when I had the original plugs in it! V
Last edited by vza; 12-21-2018 at 06:51 PM.
12-22-2018, 07:48 PM
#36
OK...more info. Swapped out plugs for OEM, and noticed 1 plug in bank 2 looked as if it were never installed, pristine, leads me to believe no gas or spark is getting to the cylinder(dah... didn't note which cylinder it was,noticed after the fact). Found 2 leaks in the exhaust, 1 where end of cat is clamped to muffler pipe(just need to tighten the clamp) the other is a small hole in the cat right at the O2 sensor seam, Bank 2. Started it up with ruff running at first but sounded ok after a minute...revved a bit and got a misfire/pop sound but no CEL. Checked Code reader and got a P0130 and P0150 pending for the 02 pre cats. Compression test as follows:
Bank 1 145/150/150 starting with Cyl closet to front.
Bank 2 195/195/180 starting with Cyl closet to front. At first I thought this wasn't that bad considering there close relative to the banks. But not too sure. What next?? Thanks V
Bank 1 145/150/150 starting with Cyl closet to front.
Bank 2 195/195/180 starting with Cyl closet to front. At first I thought this wasn't that bad considering there close relative to the banks. But not too sure. What next?? Thanks V
12-26-2018, 10:22 AM
#38
Race Director
The difference in compression reading can arise as one cranks the engine cylinders tested later are oiled and seal better. If this is indeed the case had you returned to the 1st bank of cylinders tested the compression numbers would have been up.
Even if not the different numbers don't necessarily mean the valves are bent. A leak down test can help you determine what's going on.
A leak down test lets you pressurize each cylinder and you can then listen at the intake and exhaust for sounds of leaking air. Any leaking air is almost certainly coming from a leaking valve and this can be due to a bent valve, or one that is "burned".
Even if not the different numbers don't necessarily mean the valves are bent. A leak down test can help you determine what's going on.
A leak down test lets you pressurize each cylinder and you can then listen at the intake and exhaust for sounds of leaking air. Any leaking air is almost certainly coming from a leaking valve and this can be due to a bent valve, or one that is "burned".
12-26-2018, 10:40 AM
#39
Good ...thanks...I actually did wait about half an hr to test the other bank (had to wait for my girl so she could crank the engine!!) so the engine cooled done by then as well. I also neglected to step on the throttle while doing this would that make a diff? Going to get the new MAF today and see what happens.thanks again.
12-28-2018, 09:29 PM
#40
Well....Got rid of exhaust leaks,Installed new MAF ...no stalls at start up....no misfires on 4-5 or 6 anymore....no o2 codes. NOW I'm getting misfires on 1-2 and 3 which I never got before.Codes are as follows:
P1319
P1313
P1314
P1315
Misfires on 1-2 and 3 Emission relevant. Can I drive to a mechanic or should I flatbed it?? Fuel trim bouncing around Bank 1 -0.8 to -1.6 Bank 2 0.08 to 1.6 that was using Torque Light. Got some other strange Codes with torque light Cam Shaft Pos A plausable BMW. Don't know what the Fuel trim should be....does this mean one bank is rich and the other lean?? Any good indies in Northern Bergen County NJ?? Thanks V
P1319
P1313
P1314
P1315
Misfires on 1-2 and 3 Emission relevant. Can I drive to a mechanic or should I flatbed it?? Fuel trim bouncing around Bank 1 -0.8 to -1.6 Bank 2 0.08 to 1.6 that was using Torque Light. Got some other strange Codes with torque light Cam Shaft Pos A plausable BMW. Don't know what the Fuel trim should be....does this mean one bank is rich and the other lean?? Any good indies in Northern Bergen County NJ?? Thanks V
12-28-2018, 10:29 PM
#41
Rennlist Member
Well....Got rid of exhaust leaks,Installed new MAF ...no stalls at start up....no misfires on 4-5 or 6 anymore....no o2 codes. NOW I'm getting misfires on 1-2 and 3 which I never got before.Codes are as follows:
P1319
P1313
P1314
P1315
Misfires on 1-2 and 3 Emission relevant. Can I drive to a mechanic or should I flatbed it?? Fuel trim bouncing around Bank 1 -0.8 to -1.6 Bank 2 0.08 to 1.6 that was using Torque Light. Got some other strange Codes with torque light Cam Shaft Pos A plausable BMW. Don't know what the Fuel trim should be....does this mean one bank is rich and the other lean?? Any good indies in Northern Bergen County NJ?? Thanks V
P1319
P1313
P1314
P1315
Misfires on 1-2 and 3 Emission relevant. Can I drive to a mechanic or should I flatbed it?? Fuel trim bouncing around Bank 1 -0.8 to -1.6 Bank 2 0.08 to 1.6 that was using Torque Light. Got some other strange Codes with torque light Cam Shaft Pos A plausable BMW. Don't know what the Fuel trim should be....does this mean one bank is rich and the other lean?? Any good indies in Northern Bergen County NJ?? Thanks V
01-11-2019, 11:47 PM
#44
WOW...I replaced my weak battery. Engine ran good...changed coolant and had to rev to 5000 RPMS to 'burp" the engine.....no CEL....NO CEL... Could it have really been the battery!!!
Does any one know what the fuel trim should be at idle. I'm using Torque Lite and looking at fuel trim for banks 1 and 2 sensor 1.
Mine both read -24% at idle and went toward 0% when revved. Thanks....very happy so far with the outcome ....hope it stays that way. V
Does any one know what the fuel trim should be at idle. I'm using Torque Lite and looking at fuel trim for banks 1 and 2 sensor 1.
Mine both read -24% at idle and went toward 0% when revved. Thanks....very happy so far with the outcome ....hope it stays that way. V