MY 1999 QX4 will die at low or idle speeds and now probelms starting

[Rochelle]

All of a sudden while driving though a parking lot my car turned off ? This did not happen again till a couple days later when stopped at a stop sign. I completed a full tune up changed spark plugs, air filter ,value , oil change and also put a fuel injection cleaner in my tank. No problems again for about a week again after starting car and starting to pull out my car turned off again. I then had began have problems starting my car haveing to turn it over serveral times to start. Battery working good turning over well but seeming like it wasnt getting enough gas ? Also when driving I feel a feeling of car not getting gas before turning off, I was able to push down on gas when happening one time and car never stalled ? I thought this may be due to a clogged fuel filter, we have just changed that as well and that didnt seem to help my problem. CAN YOU PLEASE TELL ME YOUR THOUGHTS ON WHAT THIS CAN BE ?

[maxnix]

Welcome to our group, Rochelle.

Tell us a little more if you can. How many miles? Has intake, EGR or IAC valves been cleaned? New PCV valve? Did you have a scan done?

And which injector cleaner did you use?

[Rochelle]

My car just hit 102,000 miles when my car first started messing up I had a scan done that said error witht he o2 sensor but they reset it saying they thought it was in error, that light would come back on if it was messed up.My check engine light had not came back on till last night,about 1 full day since changeing the fuel filter,at least a month since engine light orginally had come.Sorry it was the PCV Valve we changed we have not yet tried cleaning the EGR or IAC valve yet could that be part of my problem ? Also the fuel injection cleaner used was Gum it. Thanks for your reply on this !!

[elwesso]

welcome to NICO!

I woudl look into something MAF related, that kind sounds like what it could be.

[Styles2Bless]

Well You Need To Get A NEW Fuel Pump!!!! And Double Check Your Injectors!!! Possibly You Have A Miss Fire O Fuel!!!! From Experiance Have A Machanic Hook Your QX4 To A Computer Check!! Or Just Do It Your Self And Get A Philups Screw Driver... And Let You Car Run, Then ProCed On Takeing The Fuel Injectors Out,(NOT ALL THE WAY!)(But Not All The Way Out)(Just So You Can See If The Injectors Are Spitting) I Changed My TPS, (Throttol Possitioning Senzor) Out ! Due To A High Fuel Flow That Can't Be Fixed With Out A Mechanics Computer...... It Did Not Fix The Problem!!! See So If You Think You Can Fix The Problem By Your Self Then Do So!!! Otherwise Its You Agianst A Computer!!!! I Hope That I Helped You A Bit!!!( Change Your Fuel Pump)

[infinititech1]

why did you put a pic of you in the thread???^^^

i would check maf just like stated above...thats what it sounds like to me...quite an expensive part but a must.

[Rochelle]

I really dont think it has anything to do with fuel pump that seems to be working just fine. Also from my understanding if it was the pump then it would be a constant problem not and on and off one ? How should I check the MAF is that something I have to take my car to the shop for, or can I check my self ? I also heard it could be the fuel rely what are your thoughts on that ?

I Thank you for your all your help

[maxnix]

Since you are in CA, I would recommend tou try a bottle or two of ISO-HEET (not HEET!) in a tank or two and a can fo BG44K in a tank.

http://www.bgfindashop.com

[Rochelle]

Can you tell me where the MAF is located on car? Also how would I go about checking it cleaning it ?

[maxnix]

It's right downstream from the airfilter. I would suggest checking the connector and its wiring first.

MAF sensors don't fail unless filterss are allowed to get too dirty or aftermarket units are used.

[Rochelle]

Thank you for the info I will check it out today and see what we can find out. The Do you think I should put the ISo HEET and Bg44 in tank at same time ? Will these just help clean out my fuel system ?

[Rochelle]

OK MAF lookes good clean. Quick question when looking though my fuses and rely there is one missing say its for the rad fan ? could that be a problem ?

[maxnix]

OK MAF lookes good clean. Quick question when looking though my fuses and rely there is one missing say its for the rad fan ? could that be a problem ?

Don't know. What does you Owner's Manual say?

ISO-HEET and BG44K are OK at the same time, but run a bottle or two of ISO-HEET first, then the BG44K, preferably right before an oil change.

You didn't mention the MAF connector.

[Styles2Bless]

Okay So Its Been A While, And I fixed My Problem On My Car. It Turs Out It Was The Do To The Fact Of Sitting,OverA Period Of Time. I Jumped My Timing...... But Its All Fixed Now...... Yo I Feel Better That My Queen Is Running Better... I Love Her.... LOL....

[janoo123]

I had no problem with my car i drove like 60.000 miles on it. services on time but 2 days ago suddenly it start acting stsrting troubles & miss fires. i try to put treatment like slick50 but nothing help. any body can help me on this.thanks

[janoo123]

I had no problem with my car i drove like 60.000 miles on it. services on time but 2 days ago suddenly it start acting stsrting troubles & miss fires. i try to put treatment like slick50 but nothing help. any body can help me on this.thanks

[maxnix]

Slick50 will only harm not help.

Try posting a literate description in your own thread and include the service history, please.

[Rochelle]

OK guys here is a update on my on going problem.. We finally gave up on trying ourselfs the check engine light came on again. Same code as last po430. So took it into the shop they told me one of my o2 sensors needed to be replaced. So had it out of the shop for about a week then driving down the road my car turns off again. take it back said they cant find anything wrong had to wait till my light comes back on again?? waited again for a few weeks light back on take it to the shop said it was the same code P0430 ?? After haveing my car in the shop for 2 more days and more $$ down the drain still have no clue what the problem is ?? said my CC is working at 95% and all my o2 sensors are ping ok ? had them check my fuel said it was fine ??? said I just have to keep waiting whatever it is will get worse and will be able to find the problem. Any advice out there for me ? ... someone one please help...... lol