Alright so, I have an S50B30 in my car, OBD1 of course. I'm having some issues with it. It started with an intermittent dying problem that would occur from time to time. This problem was solved by whacking the top of the fuel pump until the car kicked back to life. Eventually this Fonz style trick stopped working.
I then replaced the fuel pump and the three relays on the engine harness, the issue was fixed for about a week. Then I smoke tested the intake and found I had a huge vacuum leak where I repaired the brake booster nipple. I then replaced the intake manifold and every single vacuum fitting and hose. I also replaced the CPS. At the same time I installed my OBD2 pink top 21.5 lb rebuilt injectors. This was done after numerous techs told me it was fine and the car would still run fine. After that the issue persisted. I can start it and drive it but the car would die when letting the clutch out unless I slipped it quite a bit. Once I got out of the lower RPMs (<2500) the car ran fine, had good power, etc. If the car died I could crank it and it would come back to life but only after around 20 seconds of cranking. It would then idle very low for a minute or so until it seemingly "cleared itself up" and the idle picked up.
Then I replaced the spark plugs, the plugs that I pulled out of the car were pitch black and a tad bit oily on the threads, nothing on the electrode however. With the replaced spark plugs it ran a bit better but still had the same issue when I touched the throttle. I have uploaded a few videos for you to look at.
Ignore the high idle, I adjusted the throttle cable to have a high idle. Ignore the brake booster hose, that is temporary to ensure there is no vacuum leaks (or at least obvious ones)
My theory is the O2 sensor may be old and too lazy to properly adjust the fuel mixture for the larger injectors without a tune. I am going to order the proper tune from Turner tomorrow. My other idea is that my shitty aftermarket magnaflow cat that is rattling around may have finally clogged my exhaust. Lastly, could this be indicative of a headgasket leak? The only thing out of the exhaust is a fuel smell and steam due to the cold weather.
Cliff notes version: replaced all vacuum related items and intake due to massive vacuum leak, replaced fuel injectors with OBD2 injectors, see above videos.
Any help is appreciated, thanks.
I then replaced the fuel pump and the three relays on the engine harness, the issue was fixed for about a week. Then I smoke tested the intake and found I had a huge vacuum leak where I repaired the brake booster nipple. I then replaced the intake manifold and every single vacuum fitting and hose. I also replaced the CPS. At the same time I installed my OBD2 pink top 21.5 lb rebuilt injectors. This was done after numerous techs told me it was fine and the car would still run fine. After that the issue persisted. I can start it and drive it but the car would die when letting the clutch out unless I slipped it quite a bit. Once I got out of the lower RPMs (<2500) the car ran fine, had good power, etc. If the car died I could crank it and it would come back to life but only after around 20 seconds of cranking. It would then idle very low for a minute or so until it seemingly "cleared itself up" and the idle picked up.
Then I replaced the spark plugs, the plugs that I pulled out of the car were pitch black and a tad bit oily on the threads, nothing on the electrode however. With the replaced spark plugs it ran a bit better but still had the same issue when I touched the throttle. I have uploaded a few videos for you to look at.
Ignore the high idle, I adjusted the throttle cable to have a high idle. Ignore the brake booster hose, that is temporary to ensure there is no vacuum leaks (or at least obvious ones)
My theory is the O2 sensor may be old and too lazy to properly adjust the fuel mixture for the larger injectors without a tune. I am going to order the proper tune from Turner tomorrow. My other idea is that my shitty aftermarket magnaflow cat that is rattling around may have finally clogged my exhaust. Lastly, could this be indicative of a headgasket leak? The only thing out of the exhaust is a fuel smell and steam due to the cold weather.
Cliff notes version: replaced all vacuum related items and intake due to massive vacuum leak, replaced fuel injectors with OBD2 injectors, see above videos.
Any help is appreciated, thanks.
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