4.6 northstar eldorado hard to start and rough idle

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4.6 northstar eldorado hard to start and rough idle

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4.6 northstar eldorado hard to start and rough idle - 4/20/2008 3:16:58 PM

97Caddy

Posts: 13
Joined: 4/20/2008
Status: offline Hi just bought the 4.6 97 eldorado 98 k miles and it takes 4-5 cranks to start it... and has slight gas smell while doing it. When i get it started it has a rough idle... i noticed its not as bad if the car is on a hill face up if that helps. The car does not overheat so... i hope it not a HG... hoping its just bad fuel filter,injectors, or carbone build up... i really dont now... if anyone thinks any of these ideas are right, or know what is wrong please tell me.

Post #: 1

RE: 4.6 northstar eldorado hard to start and rough idle - 4/20/2008 4:52:08 PM

97Caddy

Posts: 13
Joined: 4/20/2008
Status: offline also the error codes are P0603, P1153, P1553, B1152, B1552, B1971, B2471

(in reply to 97Caddy)

Post #: 2

RE: 4.6 northstar eldorado hard to start and rough idle - 4/21/2008 12:07:06 AM

jerrymac

Posts: 55
Joined: 4/6/2008
Status: offline Well, for a start, you might wanna check out my thread in the Eldorado section for a "1997 Eldo starting problem" .Several members have offered me their advice on what they thought my starting problem was, and they seem to be knowledgable people. I just dropped the fuel tank today ( sunday, April 20 ) and replaced the fuel pump, but I won't know for sure if that fixed my starting problem till the wife drives it to work this week and then I will post the results on that thread. As for your fault codes, the P603 is a PCM memory reset, and the p 1153 is the bank 2 oxygen sensor . My 97 Eldo seems to set an Oxy sensor code every time I fill the tank with a different brand of gas. As for the 4 BCM codes, I can't seem to find my BCM code list, but I am sure that someone else on here can help you with them. There is a lot of helpful information on this site by some good people if you just take a few minutes to search for it. Hope this helps .

(in reply to 97Caddy)

Post #: 3

RE: 4.6 northstar eldorado hard to start and rough idle - 5/7/2008 6:29:13 PM

stomper

Posts: 1447
Joined: 6/18/2007
Status: offline
quote:

ORIGINAL: 97Caddy

also the error codes are P0603, P1153, P1553, B1152, B1552, B1971, B2471

was this worked out ?

_____________________________

"If you're going through hell, keep going"
~ Winston Churchill

(in reply to 97Caddy)

Post #: 4

RE: 4.6 northstar eldorado hard to start and rough idle - 5/26/2008 6:37:36 AM

97Caddy

Posts: 13
Joined: 4/20/2008
Status: offline sorry for not putting anything back up broke my laptop... after removing the cover from the engine i found a little orange seal partially blown off under intake manifold...which im guessing is causing a vacum leak... i am no mechanic but is there a reason why this would have blown off and would it be the cause for the hard starting..? also when starting when its off over night in moring before going to work when its colder out it seams to start right up if that helps
o and btw i got another code p0303 which is cylinder 3 misfire i think only came up once since clearing codes and i appreciate the replies.

(in reply to stomper)

Post #: 5

RE: 4.6 northstar eldorado hard to start and rough idle - 9/12/2008 2:31:39 PM

97Caddy

Posts: 13
Joined: 4/20/2008
Status: offline Also forgot to say thanks for all the techs and moderaters, and everyone else for putting information on this site for free u guys and girls have saved me lots of money on fixing my car...cause u all now caddies are not cheap to fix...thank you all

(in reply to 97Caddy)

Post #: 6

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