Gutless GU 4.8????

[threedogs]

I'm thinking while down at Super Cheap get a Max ellery manual as it shows
procedures on how the correct certain errors ,way tooo complicated to explain here
From what Ive read on the 4.8 going they are great, but a bit finicky like the ZD30 in some respects

[Bloggsy]

G'day, I'm no expert by a long shot but had a similar bunny hopping thing in my old GQ TB42 many years ago. Funnily enough in 3rd gear. Ended up being a faulty (but new) HT lead. So i am thinking maybe a faulty coil pack in your case? just something else to check. Good luck!

[glennb]

A bit of an update for you all.

Went to 2 differnt mechanics just for shits and giggles to see what the general opinion was. turns out according to there computers that there is nothing wrong.
Everything checks out fine with no codes.
i have done a bit more playing around and found that the problem is that the computer is not advancing the timing.
its running ratarded as hell all the time. if i advance it by hand the thing goes like a rocket but ideles at about 1800 rpm.

i know in most other cars that the MAP sensor tells the computer to advance the timing and i know that these thigs use the TPS as a MAP sensor so im going down that road first. Then followed by air flow metre.

Wish me luck..... im goin in!!!

Cheers

[glennb]

Update V2.0

Have found the problem. timing chain is totally shot and out by 2 teeth. Hence the timing being so far retarded.

looks like i have to go genuine for a new kit though so thats gonna be one scarey phone call that ill be making tomorrow.

now praying to the nissan gods that the valves aren't bent.

[Bloggsy]

Glad you've found the issue. Maybe try a few of the vendors on here like NIZZBITS (Garry), Mudski etc... For a price.

[Clunk]

And patrolapart and adoc (i think)

[glennb]

Thanks guys.

Ive ale
ready contacted patrolapart via there contact us link so hope to hear back from them tomorrow.
It didnt come up with any results on the search.

gonna send Nizzbits a msg now.

Cheers

[Bigcol]

sounds to me like someone was playing around
or
had to replace the timing chain - at home - with no idea on what they were / are doing

do yourself a favour, and get a manual with pictures and some wooden wedges
when you take the cover off - BEFORE doing anything, have a look at the timing gear........ make sure the marks line up where they are supposed to
if they are ok, you will be safe to hand wind the motor over until you find the joining link in the chain
join your new chain onto the old one, and hand wind the motor over until you are back at the joining link
remove old chain, join both ends of the new chain
put it back together
THEN
take plug 1 out
scrunch up a piece of t6issue, and put it in to plug 1 hole
hand wind motor until tissue pops out - your now at Top Dead Centre
check that all the plug leads are in the right order......... you would be surprised at how many get that wrong
NOW check your timing
and

away you go...................

[SpecialDave]

So my 4.8 02 auto dual fuel was giving my mate (the dealer) an absolute nightmare of a time before It was ready - First of all, someone had tried a diy timing repair and it was trash. one we sorted that, i got the whole head redone whilst it was off for a burnt valve (probably because the timing was bonkers), it ran like a dream.... Then suddely and engine light, no code on 3 different testers and it would drop revs at stop and stall not idle... it would run if you kept the revs up and when driving no drama but slowing / stopping it died....

After 3 days with an elec, 3 days with a transmission specialist it was finally decided my instrument cluster was buggered somehow, so that got replaced and bam, no worries. funnily enough my wife's old still running 99 pulsar had an instrument cluster known fault, tehre seems to have been a patch late 90's early 2000 where Nissan clusters were a bit on the temperamental side...