Back fire on start stock 496HO
03-18-2019 | 11:44 AM
#44
Banned
Joined: Jul 2011
Posts: 9,594
Likes: 45
From: Ft. Worth TX
Thought it was going to this person ? As he should have it fixed by now and found the problems at hand ? just saying and just asking
03-18-2019 | 01:29 PM
#46
Registered
Joined: Jun 2003
Posts: 297
Likes: 2
From: MIAMI FL
also guys i have to agree with bup, if youre using auto zone parts instead of mer cruiser you're just asking for trouble,just recently i tried and iac made by sierra which a marine application and it sucked,idle was too high,so high the cam wouldn't even chop and idle speed was higher so i went back to quicksilver and idle is back to how it should be,using aftermarket autoparts might give you a new set of issues if you ask me
03-27-2019 | 01:47 PM
#47
Thread Starter
Registered
Joined: Jun 2013
Posts: 113
Likes: 1
From: Marco Island, FL
Finally got back into the engine room after weeks. Went to start; no ignition. Classic CPS.......had before. This is the third one in 7 years and only 200 hrs. Swapped it out and BINGO; running like a raped ape again. Nothing negative, mirror image with port engine. I think I have a serious Electrolysis problem. Will need some advice on that, both engines do not appear to be grounded to one another. Any way I’d say I had a slowly failing CPS that finally totally failed.
03-27-2019 | 05:45 PM
#48
Registered
Joined: Jan 2005
Posts: 4,822
Likes: 376
From: IL
Finally got back into the engine room after weeks. Went to start; no ignition. Classic CPS.......had before. This is the third one in 7 years and only 200 hrs. Swapped it out and BINGO; running like a raped ape again. Nothing negative, mirror image with port engine. I think I have a serious Electrolysis problem. Will need some advice on that, both engines do not appear to be grounded to one another. Any way I’d say I had a slowly failing CPS that finally totally failed.
take it for what ever its worth,I would run a ground wire from one engine to the other,
03-29-2019 | 11:11 AM
#50
Banned
Joined: Jul 2011
Posts: 9,594
Likes: 45
From: Ft. Worth TX
Grounds and resistance and EMI and RFI can be the reason for running issues and the cause of sensor failures over time. The water pressure sensor fails easily from EMI / RFI. The crank sensor as well but not like the water pressure sensor. .
Last edited by BUP; 03-29-2019 at 12:14 PM.
