Morning everyone, i now have a problem since my came belt and water pump change, this has never happened before so unless its just coincidence or something was knocked during the work undertaken. Get in car this morning, start sit there for 3 mins while windows clear, pull out of my drive half way up road and car just stalls. Busses and all sorts waiting to get by but luckily there was a place behind me. Tried starting but wouldn't just turned and turned without firing for about 5 mins of trying then it started, as from earlier automatic choke still on as it was idling about 1 n half usually afterwards it drops down to just beneaty 1000 but it was rough idling and when I press accelerator as to give it a gentle rev its was misfiring and rough, after 20 mins of driving problem went. Its always been very resposive on revs with no hesitation or lumpyness what could this be? Mechanic thinks iy could be intercooler pipes maybe a split and its sucking in air??

 

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Dirty or wet MAF?

Look at ptu and cas, 2 sensors on cambelt covers,

They would have been disturbed doing belt change.

Check the wiring plugs are on properly.

Also the coolant temperature sensor on the pipes would have been disturbed so worth checking.

Hope u get it sorted...

Ok thanks guys

 

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Temp sensor connection, ptu, connection and cas connection, check all of these, will not be a split intercooler pipe

 

Jeff TT

Hi Jeff. ive checked all what you guys have mentioned. some of the plugs were slightly corroded so i cleaned them up and put all back together, even checked MAF and used some electrical contact cleaner ( fast drying) still the same, but when i drove down the road the car started running really rough again and then the revs were going up on its own and i had to turn off the car as it was going up and up!!! WFT have the garage done to my car?? i always seem to get ripped off where ever i go. all i wanted was a cambelt and waterpump change and now it seems to have come out worse than when it went in! you'd expect for £900 i would have had a running car! well at least one that doesnt want to drive itself!

Edited January 24, 201411 yr by leeroy73

Hi Jeff. ive checked all what you guys have mentioned. some of the plugs were slightly corroded so i cleaned them up and put all back together, even checked MAF and used some electrical contact cleaner ( fast drying) still the same, but when i drove down the road the car started running really rough again and then the revs were going up on its own and i had to turn off the car as it was going up and up!!! WFT have the garage done to my car?? i always seem to get ripped off where ever i go. all i wanted was a cambelt and waterpump change and now it seems to have come out worse than when it went in! you'd expect for £900 i would have had a running car! well at least one that doesnt want to drive itself!

 

Ok its most likely something and nothing so try to not get too stressed yet, something has been disturbed most likely, check though the large throttle pipes to be sure they are seated well and not leaking, you could also try unplugging the afm and start the engine and see if it is running ok, remember it will be limited to around 2,400rpm with it unplugged. If it runs better with the afm unplugged it narrows it down a bit as its something effecting the mixture, this will either be an air leak or the afm itself.

 

Try it and report back what you get, I take it you had more than the cambelt etc done for £900?

 

Jeff TT

Jeff, i had all what you sent me fitted, plus oil and filter change and some other belts. in total with your bits it cost just under £900 book says 4 hours for cam belt change, he said it took him 7!

 

will report back what is the AFM and where is it located? ahhh Air flow meter ;)

 

Regards

Edited January 24, 201411 yr by leeroy73

Hi Jeff check AFM seems ok. but car still runs like a bag of shit. it is stressing me out cos ive just paid out 900 quid for a car thats come out worse than when it went in. I took the car back yesterday to have one of the new belts tightened and asked again why its running so bad when i start it from cold. he still said its the intercooler pipes! ive bought new ones anyway as i can see that there is cracks and splits all over them. i think they are the original stock ones so they do need replacing, My worry is this. whats causing my car to run like it is when started from cold? it stalls continuously. one of the belts is squeeking like mad., and the idle is erratic and lumpy, and also when i press the pedal it hesitates before reving, also a loud ticking noise is present now which there wasnt before. it was running perfectly before the work took place. do i go back to the garage a third time? cos by the looks of it if they cant do it right the 2nd time what makes them think they will correct it the third? i dont see how all this has happened from cam belt and water pump change.

Edited January 26, 201411 yr by leeroy73

Sorry to hear the issues with the car are begining to stress you, I do think a deeper look into the problem is needed, as you mention the issues were not there before the work then the garages reasoning that inter-cooler pipes are the problem are the issue is not an answer and as much as you do not feel they are up to the job you do need to return to them to correct what ever went wrong or at least definitively find the cause.

 

You need to speak with the service manager or his boss and explain in a cool way the situation and you want to give them the opportunity to deal with the problem and book the car in for them to do it, make it clear the problems were not there before.

 

Shame your not closer or would happily attend to the issue for you, alternatively if the garage do not want to play ball or are stuck on where to go with it I can always speak to them on your behalf to pave the way for you if you wish.

 

Jeff TT

Sorry to hear the issues with the car are begining to stress you, I do think a deeper look into the problem is needed, as you mention the issues were not there before the work then the garages reasoning that inter-cooler pipes are the problem are the issue is not an answer and as much as you do not feel they are up to the job you do need to return to them to correct what ever went wrong or at least definitively find the cause.

 

You need to speak with the service manager or his boss and explain in a cool way the situation and you want to give them the opportunity to deal with the problem and book the car in for them to do it, make it clear the problems were not there before.

 

Shame your not closer or would happily attend to the issue for you, alternatively if the garage do not want to play ball or are stuck on where to go with it I can always speak to them on your behalf to pave the way for you if you wish.

 

Jeff TT

 

hi Jeff is it poss the belt is on wrong or has moved a notch youve said to me before fitting these belts is not straight forward as many garages think

hi Jeff is it poss the belt is on wrong or has moved a notch youve said to me before fitting these belts is not straight forward as many garages think

 

Anything is possible but to run so badly would need the belt or i cam timing to be off by a fair amount, as I read it also the car ran ok till the next day? if so less likely a belt issue, but again as always there is a chance something has going wrong during the instillation that has had an effect later, just so hard to be certain as the symptoms can be the same for a whole raft of reasons, also do not want to dis the garage either if its not their fault.

 

Jeff TT

I totally understand jeff. i think what i will do is check all the hoses that i can get to , and all the plugs ect maybe they knocked something or disturbed a hose. if i have no joy and its still the same , then i guess i'll take it back into the garage and see what they say. Also the new intercooler pipes should arrive tuesday, im hoping its them thats the cause , but as you say its probably not those. if i lived nearby jeff i'd only ever use your services, but im miles away. thanks for your reply. i'll keep you posted.

 

I found this , this is similar to my issue

 

http://www.300zx.co.uk/forums/showthread.php?109832-Rough-running

Edited January 26, 201411 yr by leeroy73

I would stop trying to start it m8y.Until you can confirm that the cambelt is properly installed at least . The problem may lie there if the tensioner wasn't correctly tightened and has come loose..

The thing i cant work out is when its warmed up and been driven for half hour or so its perfectly fine. this is whats confusing me.....

Sounds to me that you may have a cold start issue that may of coincidently occurred at the same time.

Once warm, maybe it's worth checking your base idle along with your auxiliary air control valve system.

Just a thought.

Hi Redwine, do you think it could be a IACV issue then, i'll have a go at cleaning it. i hear its a bit of a bugger to get to and remove

Tricky looking for solutions just from an owners description, sometimes what some will describe as a misfire some will describe as a hesitation or pulsing, had many times with zeds booked in to be look at for said faults to find a much simpler running issue that is neither a misfire or a true hesitation its all in the eye of the owner really, here once the common symptoms / causes have been exhausted it really needs a hands on to find the problem be it a connection, air leak or whatever, hope you get it sorted Leeroy soon as poss.

 

 

Jeff TT

ok, well more bad news, garage cant have my car back till wens, so started it this morning and same as usual, lumpy start, stalled again, noisey belt, then after 30 mins of driving noticed the heater wasnt working ( blowing heat) then about another 20 mins later the heat came on??? and it then started to run correctly so parked her up and left her idling for a while then all of a sudden started running like its on 4 - 5 cylinders!! and this happened while i was just looking in the engine bay.............. ;(

 

 

i got bored so typed in ebay rough running 300zx and found a video with one that sounds exactly like mine... bad injectors and old clips . do you think this is possible? could something have been disturbed during the cam belt and water pump.

Edited January 27, 201411 yr by leeroy73

Hi jeff I know your probably up to your neck in it but it was wondering if you could give me the heads up on this if possible I dont often deal with garages a lot and I was wondering where I stand with all this as they have kindly offered to take the car back and go over what they have done including a diagnostic as the car is not running on all cylinders but they then said if its nothing they have done I will have to foot the bill, I do understand that coincidence can happen but to be totally honest the car was running perfectly before apart from one of the belts squeaking hence me taking it in in the first place. I wonder if garages will try to avoid blame and point at something else.....

 

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Tricky looking for solutions just from an owners description, sometimes what some will describe as a misfire some will describe as a hesitation or pulsing, had many times with zeds booked in to be look at for said faults to find a much simpler running issue that is neither a misfire or a true hesitation its all in the eye of the owner really, here once the common symptoms / causes have been exhausted it really needs a hands on to find the problem be it a connection, air leak or whatever, hope you get it sorted Leeroy soon as poss.

 

 

Jeff TT

 

Hi jeff I know your probably up to your neck in it but it was wondering if you could give me the heads up on this if possible I dont often deal with garages a lot and I was wondering where I stand with all this as they have kindly offered to take the car back and go over what they have done including a diagnostic as the car is not running on all cylinders but they then said if its nothing they have done I will have to foot the bill, I do understand that coincidence can happen but to be totally honest the car was running perfectly before apart from one of the belts squeaking hence me taking it in in the first place. I wonder if garages will try to avoid blame and point at something else.....

 

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No worries Leeroy, will pm you a little later, might be best if I speak with these guys for you as often they prefer to talk garage to garage and often it prevents misunderstandings etc, anyway look out for my pm once I have finished my tea etc.

 

Jeff TT

could it be that timming unit thing being loose thats moved a little when not tight up properly thus why it run fine for a day then not the next day when cold. and when cold if the timmings out a couple of degrees then this will make it run like a sack of. then until it wams up enough not to make a difference and as for the heater not working for a good while i recon that the cars water level is not right filled up. this may all be wrong of course but seeing you had the water pump done or ment to have, urll proberly find you ant got a thermosate next. hope it works out buddy.

Thanks doc ill be back no doubt lol

 

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Have sent you a pm Leeroy.

 

 

Jeff TT