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1990 Cadillac Sedan Deville 4.5 JA: Thanks. Can you give

Customer Question
1990 Cadillac Sedan Deville 4.5 JA...
1990 Cadillac Sedan Deville 4.5
JA: Thanks. Can you give me any more details about your issue?
Customer: Recently started running rough, has a mis while idle and drive,. replaced the rotor (melted at tip, replaces cap (seemed ok, and plug wires, but didn't change performance!
JA: OK got it. Last thing — Cadillac Mechanics generally expect a deposit of about $18 to help with your type of question (you only pay if satisfied). Now I'm going to take you to a page to place a secure deposit with JustAnswer. Don't worry, this chat is saved. After that, we will finish helping you.
Submitted: 1 year ago.Category: Cadillac
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Answered in 4 hours by:
4/8/2016
Cadillac Mechanic: Vladgmru, Automotive Electrician replied 1 year ago
Vladgmru
Vladgmru, Automotive Electrician
Category: Cadillac
Satisfied Customers: 2,668
Experience: I've been working with American made cars since 1992.
Verified
Hello and welcome to JustAnswer.Thanks for requesting me to answer your question.Did you also replace spark plugs? or just ignition leads with cap+rotor?Does it looks like only one cylinder misfiring? backfiring?
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Customer reply replied 1 year ago
Replaced
Cap, Rotor, Plugs, Wires,. still missing.
I also set the gap of plugs (.60)
Cadillac Mechanic: Vladgmru, Automotive Electrician replied 1 year ago
Hi,Well, looks like you replaced all components of the ignition system, so I would check fuel injectors and injectors wires as have seen once when injector wire was shorted to ground resulting in injector staying open all the time and squirting too much fuel. Maybe it is worth to have removed and checked/ cleaned on a special machine.If there is nothing wrong with fuel injectors, then I would suspect engine timing. If I remember correct, those engine nave had some issues with timing due to weak camshaft sprockets that could cause timing chain to jump few teeth.
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Cadillac Mechanic: Vladgmru, Automotive Electrician replied 1 year ago
Hi,I am just checking if you have any news about the problem or if you need more assistance?Thanks,Vlad
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Vladgmru
Vladgmru
Vladgmru, Automotive Electrician
Category: Cadillac
Satisfied Customers: 2,668
2,668 Satisfied Customers
Experience: I've been working with American made cars since 1992.

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