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RomulanS13 · 09-01-2018, 06:43 PM

Whats up all. I have an s13 sr20det swap that runs fine through all rpm's but under heavy load and boost over 4psi it will bog and sound like its only running on 2 cylinders but if i let off the gas 25% throttle it will run right. Ive replaced the plugs and re gapped .28 checked for any boost leaks non. When it does this theres no back firing just a noticeable loss in power and sound until I let off then the motor sounds correct and doesnt hesitate.

I also checked my TPS and reset it to .45 at idle and it goes almost to 5v at wide open throttle. I bought the motor from someone local to me and im sure the motor ran fine when he had it. He sold it cause he was in a collision. It also has hard start issues since I swapped it into my hatch as well as this hesitation.

Could it be that he may have pulled the CAS at one point and just slid it back in and being off a tooth or so causing the hesitation under load issue?

09-01-2018, 06:43 PM	#1
RomulanS13 Join Date: Oct 2017 Location: near salty oceans Posts: 30 Trader Rating: (0)	sr20det possible timing issue Whats up all. I have an s13 sr20det swap that runs fine through all rpm's but under heavy load and boost over 4psi it will bog and sound like its only running on 2 cylinders but if i let off the gas 25% throttle it will run right. Ive replaced the plugs and re gapped .28 checked for any boost leaks non. When it does this theres no back firing just a noticeable loss in power and sound until I let off then the motor sounds correct and doesnt hesitate. I also checked my TPS and reset it to .45 at idle and it goes almost to 5v at wide open throttle. I bought the motor from someone local to me and im sure the motor ran fine when he had it. He sold it cause he was in a collision. It also has hard start issues since I swapped it into my hatch as well as this hesitation. Could it be that he may have pulled the CAS at one point and just slid it back in and being off a tooth or so causing the hesitation under load issue?