I asked a friend to check the timing on my car the other day and he stated " yeah the timing was dead on 2 Degrees BTDC, so knowing him he is normally ok with cars and maintance i took his word for it, today i went for a drive and the car was pinging waaya too easily, so i got home pulled out my timing light, and rechecked the timing. to find that the timing mark was all the way back at 24 degrees. How the hell did he manage that!anyways, I reset the timing and all should be good now, I wander if this could have been the cause for the heavy fuel use! Btw its a 1986 Nissan Sunny with the e13 engine haha
bopbargains,
Oct 2, 8:07pm
did he leave the vacuum advance hockedup when he checked it!.
morrisman1,
Oct 2, 8:29pm
was it 24° advanced or retarded!
If you hook a vacuum gauge up to the vac advance line there is bugger all vacuum at idle so should not make much difference. Most vacuum is at light throttle positions and moderate revs from what I observed.
ginga4lyfe,
Oct 2, 8:33pm
it was 24 btdc , and i asked him how he had done it, and he did disconnect the line and kept the line plugged while he checked, ah well, I atleased hope the car pulls better, with anyone else with me int he car is seamed to really bog down and be slow, so im hoping the power is atleased upped :P
crzyhrse,
Oct 2, 8:44pm
He adjusted or replaced the points AFTER checking the timing.
IIRC they went much better with the dwell a little high too.
crzyhrse,
Oct 2, 8:52pm
Assuming it's an N11 the dwell should be 54º -61º but better at the higher end - otherwise they felt really gutless down low - like a 2-stroke.
ginga4lyfe,
Oct 2, 9:21pm
N11 are the pulsars but almost exactly the same, mine is the B11 chassis , and unfortunitly i cant do dwell angles. I was never taught how to set them either :(
intrade,
Oct 2, 10:14pm
the problem with petrol cars is that the fuel pinks the bearings to have play and then the pistons are not tdc no more and the problem gets worse and worse the more play it gets the more it pinks or pings. also nissn like to ear its timing chain as they mostly dont use duplex chains and the guides and oil pressure tensioners also fail causing retarding of the camshaft with chain rattle.
snoopy221,
Oct 2, 10:24pm
Sheesh ginga it's ONLY a 1200. juss caus they call it a 13. points at .018 thou timing at 10 ta 12 degrees-and No Fat Chicks.K. [Oh and good luck with the **Duplex**-now lemme see is duplex another name for a phrophylactic(condom)-mmkay. yip double check that ***duplex** timing chain in ya E13.LMAO] -Note to intrade-it's got a cambelt-K
crzyhrse,
Oct 2, 11:31pm
Dwell is just the effect of the points gap. You set the gap to get it started then correct so the dwell is right. If the dwell is too large the gap is too small.
msigg,
Oct 3, 5:05am
Those engines like 96 octane. Then if its advanced so much wouldn't have been as bad. Still too far though.
bopbargains,
Oct 3, 5:26am
The vacuumwill be high at idle andbugger allatWOT.
morrisman1,
Oct 3, 7:15am
that is manifold vacuum. The vacuum that the dizzy sees is taken from beside the throttle butterfly and is quite unrelated to manifold vacuum.
mrfxit,
Oct 3, 8:03am
It's written in the workshop manuals to disconnect & plug the vacuum line when setting the timing on the older engines Always had been for many many years
ginga4lyfe,
Oct 3, 8:33am
hmm I was told and shown 2btdc, and it saying set to 12!Yeah. confusing
ginga4lyfe,
Oct 3, 3:31pm
Oh i mean "hmm I was told and shown 2btdc via Auto data and others, and you are telling me set to 12btdc! Yeah.confusing me", I still dunno how to adjest dwell, so im just gunna have to look it up, or go for electronic points
bopbargains,
Oct 3, 3:54pm
Thevacuum for the dizzy mustbe takenfromafterthebutterfly.As I saidbefore.Atidle the vacuumishigh and at WOTthevacuumis low. You are gettingconfessed with air speed.
bopbargains,
Oct 3, 4:00pm
Or if you stilldon't understandit.thinkof it this way.At WOT youhavelowvacuumbuthighair spedand at closethrottle you havelow air speed andhigh vacuum.
crzyhrse,
Oct 3, 4:02pm
Yes, vacuum for vacuum advance is taken off manifold vacuum, not venturi vacuum generated by airflow through it. If vacuum was taken from the venturi it wouldn't be load sensitive which it needs to be but engine speed sensitive - but that's the job of centrifugal advance.
crzyhrse,
Oct 3, 4:03pm
Let's not get into ported vacuum.
ginga4lyfe,
Oct 3, 4:08pm
anyways i found out about dwell angles and setting and stuff, so i set the points to .55mm or 51 degrees dwell angle, and i staticly set the timing to 2 degrees btdc , i then fired up the car to double check with timing light to see that the timing according to the light was at 12 degrees btdc , so i switched off the car and rechecked and it was still int he same place as before.fired up the car and rechecked and it shows at 12 degrees again. ok. wtf is going on! Is it because maybe the timing belt is a little too slack! ( as i had done that recently! ) Im at my limit of knowledge here haha, I suppose i can only pull the cambelt timing cover off on another sunny day and recheck that the timing belt hasnt slipped a tooth os something ( and yeah i know snoopy its only a 1270cc car and no fat chicks, but sometimes you just know it isnt performing right! )
crzyhrse,
Oct 3, 4:13pm
If the timing belt was slack and the distributor was driven off the cam (I honestly can't remember) the timing would be erratic.
Don't waste your time with static timing. Set the timing with the engine running once you've increased the dwell by decreasing the gap.
ginga4lyfe,
Oct 3, 4:20pm
thats the thing, Even when the timing light is hooked up i cannto bring it past 7 degrees,it hovers between 8 and 13 if i bring it as far around as the dizzy will allow me. I guess it is a little erratic in a sence, ( Why do i buy seamingly good cars with nigly problems ! )
jasongroves,
Oct 3, 4:24pm
I've got an electronic dizzy in mine which will be no use to me once I get around to changing engines. Apparently they are bought up and used (modified slightly) in A series engines. I may even have a couple.will have to check.
jasongroves,
Oct 3, 4:27pm
Dont get me started on niggly problems! Lol. Just wait until it starts leaking from every possible rubber door and window seal! I seem to find a new one every week.threw the carpet out ages ago.
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