So...as you all know I recently had a full engine rebuild and manual conversion (courtesy of Jimmer and Jeff@Zedworld).

 

My first problem is that I now seem to have an intermittent problem where regardless of whether I am accelerating or holding constant speed, I lose power. Revs and speed start to decrease slowly as if I had taken my foot off the pedal. If I keep my foot on, the power comes back and then disappears repeatedly. I've learned that to get past the problem, as soon as the power drops, I release the pedal for a second or too and this seems to solve the problem until the next time it occurs...

 

Jeff has had the car on Conzult and been over it and can't seem to find anything out of place so this is really just a call to see if anyone else has experience of this problem?

 

My second problem is that in gears 2 and 4 i get a weird whining/rattling noise from behind the centre console whether the car is moving or not? I don't remember hearing this until this weekend (2weeks since having the rebuild).

 

Thanks for any help guys!

have you checked the obvious such as MAF?

have you checked the obvious such as MAF?

 

I have not yet as I'm not sure how too :confused:

 

Although having read all the posts on here in the past doesn't that usually only play up in the wet? As this problem occurs in the dry as well...

MAF's tend to randomly go. mine decided to go the other month causing crap running and crap idling. replaced MAF and all was perfect.

MAF's tend to randomly go. mine decided to go the other month causing crap running and crap idling. replaced MAF and all was perfect.

 

Hmmm..i'll have to do a search on here then and see how to check it then! Thanks bud!

find someone near you with a working MAF and swap it over and see if it cures it.

find someone near you with a working MAF and swap it over and see if it cures it.

 

aha...therein lies the problem as the hesitation doesn't always occur! I can't predict when it happens so will be very hard to test!

hmmmm... might be worth buying one then and sticking that on. even if it does not fix the problem its always worth having a spare maf.

hmmmm... might be worth buying one then and sticking that on. even if it does not fix the problem its always worth having a spare maf.

 

lol...never ending outflow of cash eh! I'll look into it..unless there's a working 2nd hand one...

2nd hand ones are not to hard to find. they are normally £90.

http://300zx.co.uk/forums/showthread.php?t=127777&highlight=MAF theer you go mate 100 quid

http://300zx.co.uk/forums/showthread.php?t=127777&highlight=MAF theer you go mate 100 quid

 

Aren't you a useful guy! lol..cheers bud!

no problems bud... glad i could help

I've got a good working one - £80 plus P&P

 

Steve :)

did you have new o2 sensors when you had a rebuild? When i had mine it went through a period of doing things like that.

 

As for the rattling, perhaps a gearbox mounting or somthing difficult to tell!