Northstar Engines and System Technical Discussion Discussion, Bouncing Idle, new sparkplugs and oil after seafoam or TEC? in Cadillac Engine Discussion; Hello everyone,
97 sls 117k
I am having a slightly wonky idle while coasting. Idle dips 500 rps and bounces ...
Bouncing Idle, new sparkplugs and oil after seafoam or TEC?
97 sls 117k
I am having a slightly wonky idle while coasting. Idle dips 500 rps and bounces back up, will stall sometimes.
after researching for a while I have found many folks on this site who have encountered this however no one who has solved it. I have narrowed it down to FPR or an injector clogged by carbon build up, of which i have a lot, and riching up a cylinder. I have some p0138 p0139 and p0141 codes as well even though i replaced the o2 sensor.
my FPR is not leaking, but i still have the original plastic fuel rails, calling the dealership on that one tomorrow, hopefully new lines come with a new fpr.
in addition to that i am going to be cleaning out the top of the engine with some TEC or seafoam to try and reduce my carbon and try to clean out a possible drippy injector.
I just changed my oil and put new plugs in, do I really have to change the oil and plugs after using TEC?
How often can/should you use a product like TEC?
Thank you all, I will keep you posted on my progress.
Re: Bouncing Idle, new sparkplugs and oil after seafoam or TEC?
I cleaned the TB through the butterfly. I would really like to take it, and the intake plenum off to clean them thoroughly. Instead of taking all that effort to disassemble the top of the engine, I thought I would try out TEC/UEC/Seafoam first.
The car is going in on Monday to have the fuel rail replaced on account of the recall, then I will take off and clean the TB and IAC and air passages, then I will TEC..