2003 Murano trouble starting, shaking, heater works intermitently

[dancendreams]

72000 mi. Dec. 2007, service engine light on. rough on cold starts. Rpl one catalytic converter/gasket (no charge from dealership). Down by oil filter rubber hose rubbing against oil pan. rpl oil cooler hoses, rubber ring &2 hoses. Gurgling on pass side of dash-purged cooling system. Multi point insp, recommends brakes need imm future attention (that's funny because I had all 4 brakes replaced in car less than 30 days prior. Replaced drive belts (dealer said they were looking worn) Belt-Pwr s and Fan&a. Resealed leaking oil pan and replaced oil cooler o-ring. $522.40Radiator blew last week. Repaced radiator, hoses, thermostat. Car flushed by local mechanic in December and by dealership in Jan. Gurgling still there. heater started blowing cold air while I was driving. When set to Auto fan is once again blowing cold air, not waiting until engine is warmed up to start fan blowing at full capacity.After spending 552.40 at dealership and close to 600.00 last week on radiator problems and now car having problems with cold start, shaking, heater not working.... what am I to do now. Service engine light actually started blinking on me yesterday when I was starting it up. I am tired of this and out of money!!!

[NISTECH]

Start up and run problem: check your intake tube between the air filter and throttle body. Make sure the boot is securly fitted over the plastic baffle in the middle. The tube tends to come of that due to loose hose clamps.

Your heater not working is an air pocket in the cooling system. Someone is not bleeding it right. Also the fan on the auto air will go to full speed even if the car is not warmed up yet. The air pocket is assuming its only blowing cold air at idle, not while at cruising speeds. If its blowing cold air at cruising speeds then its probably a disconnected in cabin temp sensor or ambient air temp sensor.This is not as likely as the air pocket problem.

[dancendreams]

flush was done on 12/21/07 by local auto repair shop then again in January by Don Davis in Arlington and cold air was blowing only in idle position but last night while cruising. turned it off then later while cruising heater worked for a while but within 15 min it was blowing cold again

[dancendreams]

I thought I was told that the air flow, when set on Auto, would only be on the highest blower setting, only once the temperature was at what I would set it to ( like 78 when it's 40 outside) Do you think service engine light is on because of the heater issue or possibly because the 2nd catalytic converter is going out? Dealership said once the first one goes that I would only have about 2-3 weeks before the 2nd one would go. (that's what they said in January)

[Q45tech]

Out of money? Hope not because you are just entering the start of expensive years/ miles.

Seems early for rad problems unless you didn't change coolant at 30k, and 60k?

Cats seem to be fairly normal after 80k.

We estimate that V6 will cost around $2-2.5k per year prorated to maintain to near new specs after warranty. CVT is a unknown whether it will last beyond 7-8 years like the more conventional AT?

[driftingmy240sx]

what code is stored in the ecm. when the check engine light flashes it means what ever fault is present it a catalsyst killer. sounds like you have a air pocket in the heater coor as well.

i have seen misfires on these suvs due to bad coils. if it was a bank 1 converter that was replaced the hard start and shaking may be related o that repair. how long has it been running poorly?

[mister2nr]

With the heating issue with you saying that the radiator and the coolant system has been flushed twice, also that when you drive you say that it blows heat and at idle its cold. I know that a lot of Nissan cars are sensitive to have a 50/50 mixture of coolant and water. I would ask the dealer if that was done and if so could they check it with a refractometer to confirm it. If not they should reimburse you for that. I have fixed many Altima, Maxima, Murano, and 350z cars with this problems after major services, engine, or any type of coolant issue. With the shaking and hard start you need to get the code from the ECM to see why the MIL light comes on.Also that gurgling is probably not your coolant system but probably your A/C system low possibly. Also another thing I have dealt with a lot.

Hope this info is helpful.

[driftingmy240sx]

the a/c system WILL NOT cause a gurgle noise. the gurgle is air trapped in the heater core. also the reason you have no heat at idle. as you accelerate engine speed coolant is flowing into the heater core and gurgling due to trapped air, the coolant flow also allows for heat at off idle engine speeds.

if the a/c system was low you would hear a hissing noise fron the heater core area not a gurgle.

[mister2nr]

Your right my mistake on the gurgle noise. I got it mixed up in my head when thinking about it.