Hey guys maybe you guys can help me out? I have recently had my radiator replaced aswell as my alternater and starter. The cars has been running good but every so often the cars acts like the parts that were replaced are broken agian. My car has 150,000 miles on it. I was thinking that maybe it could be the ECU that is going bad and is sending wrong signals to different parts of the car. What do you guys think?

 

First, the year and model of your car (VE or VG)

Second, exactly what is the car doing. If it acts like the radiator, starter and alternator "are broken again" those symptoms really wouldn't be the same as if the ECU was bad.

Please be specific.

 

ecu does not send anything to a radiator. The start get a signal from a relay not really ecu problem either. Ecu does thinks like sensors

 

I have a 1991 maxima se with a vg engine. I have just replaced the alternator,radiator and starter with the last month. The starter was changed three times because apparently they went bad. I changed my alternator because it died. I also changed my radiator and thermostat. The cars temperature gauge was going up to hot even though the fans were running. This is only happened once so i turned on the ac and the temp went down. As of tright now the atarter is stil good. Now last night I noticed the car was weak so i suspected it was runnung on the battery. sure enough it was. It is like the alternator dided again. This cannot be possible. Also the car has idled high and begin to take along tiime shift into 2nd. But for the last week the car has been in great shape no problems. I am really getting frustrated.

 

have you checked the water pump to make sure its still working and pumping water as that could cause the car to over heat if water isn't flowing. Also is the timing on the VG30 correct. High idle could be part of the IACV or a leaking vacuum line somewhere in the engine. I would say u use a smoke machine and smoke the engine out and check for any and all leaks like around the IACV, the throttle body, and the intake plenum just all around the engine where air can travel. vacuum leaks can raise idle pretty high. Also check that the throttle cables are routed correctly in there correct placements.

 

Running the AC would not cool the engine down, if anything it would make it hotter...

 

maybe he meant he ran the heater which would aid in cooling the temperature in the engine bay. since the heater core is in sense a second raidiator for the cooling system.

 

loose belts can cause these issues as well.

 

Since you have the vg engine,my guess is you have a bunch of air bubbles in the cooling system after the radiator/t-stat were replaced..this issue(air bubbles) will cause considerable fluctuation of the temp needle..

You will need to jack up the front end of the car as high as possible or about 2-3 ft in the air/remove radiator cap/start car/keep topping off the radiator with coolant as the car warms up to operating temp until it will hold no more coolant...Done.

As for the transmission issue,it may be the on it's way out..

where are you getting your alternators/starters form?

 

transmission issues?

 

Well I got the alternator from pep boys because i got stuck somewhere in jersey with no other choice. I tried to atart the car today and gave it a boost it started but i disconnected the battery to se if it would turn off and it did. So its like the alternator is bad again. Is it possible something is damaging the parts. Do i have that much bad luck that I have gone thru 3 starters and possibly 2 alternators in a month and a half? By the way thanks for everybodies help. I appreciate it.

 

have you checked/replaced your fusible links?

 

What are fusable links?

 

pieces of wire that are designed to melt before the rest of the wiring does.
sometimes they are just funny looking fuses.

 

 

on the ve theres also the ones on the other side of battery. not sure about the vg and its 2 wet for me to go out and look. nah jus lazy.

 

He has a vg mooze... Read the thread..

 

i saw that i have a ve vg and vq outside

 

So what was the point of your post? the ve has nothing to do with this thread.

Don't ***** up the technical threads with useless posts dude...

 

i was just saying that if its not the box on the right of battery it might be the box on the left (not sure if the vg has one) that box fixed my alternator and coolant problems

 

Thanks mygreenmax94. I will check it out. i am just about ready to get rid of it.

 

Nope the vg has only one fusible link box,the one i pictured..

 

It sounds like you have two seperate issues.

First issue is the cooling problem. It sounds like air bubbles, bad water pump, bad T-stat or a bad temp sensor.

Second issue is the electrical/charging system. Either you are getting crappy remans or you have one of the following: loose alt belt, bad battery, bad connections to the battery, bad connection to the alt, bad grounds somewhere or an electrical drain of some kind. Usually, this will be a stereo system with a bad ground on the amp or something.

These are not terribly bad problems, you just need to get them fixed correctly or do a more thorough job of replacing the bad parts.

I don't think I would give up on a car for these little things. It's not like you have a rod knocking or a bad auto tranny. Those are serious issues that might want to make you give up on the car.

 

Might check the volts. Low volts causes the starter to pull more amps (current) which causes it to go bad. Electrical motors like volts over amps.

Something might be loading down the alt.

Make sure the battery is hooked up correctly.