3SGTE cam timing. Update IT RUNS

[ee904age]

I've got the 3S into my SW, its all wired and plumbed up apart from a couple of heater hoses.

It cranks good but only fires once then just turns over and over. My thinking is I've c*cked up the cam timing and its firing at the top of the exhaust stroke.

The cars not at my house so cant check, but is it possible to pull the dizzy and turn the rotor shaft 180 deg to match? I really dont want to have to do the cambelt again now that the engines in the car!!

[Mr Revhead]

have you triple checked all plugs etc? hooked up the earth? Wouldn't be the first time someoen forgot to put the earth back on!

[fivebob]

It cranks good but only fires once then just turns over and over. My thinking is I've c*cked up the cam timing and its firing at the top of the exhaust stroke.

If it was 180° out it wouldn't even fire once, might backfire though.

Check the wiring from the distributor to the ECU, the engine earths, and check the plugs leads are in the right places, i.e. put it at TDC on #1 compression stroke then take the cap off and check that the rotor is pointing to #1 lead, then check the firing order is correct (1-3-4-2)

If all appears ok, put a timing light on it while it's cranking to make sure it's firing in about the right place.

[ee904age]

have you triple checked all plugs etc? hooked up the earth? Wouldn't be the first time someoen forgot to put the earth back on!

Haha, yeah, there was no earth cable with it, so made one up with welding cable so theres plenty of earth. I've checked all the plugs and leads (I originally had # 2 & 4 arse about) they are all good now.

Fivebob, I worded that wrong, you're right, it backfires at the first turn of the key then nothing, theres unburnt fuel coming out exhaust. Will try a timing light on it later in the week.

[fivebob]

Whilst you can swap the leads around I'd check the cam timing, because I can't see how it's possible to get it 180° out and still work.

Do you mean it's 360° out

Even then I'd still check the cam timing, because if you made that sort of error it's possible you made other errors as well because there is no way you could do that and still be following the instructions.

[ee904age]

The only thing I can think of is if it was wrong to start with. Nothing was moved between removing the old belt and installing new one other than taking off the cam wheels to replace the seals, and I marked them before taking them off, and still had the old belt on when undoing them.

I know I should have checked and reset it all but hindsights a great thing.
I just lined up all the marks, took off old belt swapped the seals and put on new one.

The plug leads were all disconnected from dizzy when I got the motor so who knows?

It definately seems like its firing on an exhaust stroke, so yeah, crank must be 360 out.

[XS1V]

Crank being 360 out is the same as the dizzy being 180 out.

Are you sure leads are in the right order?? I know you said they are but I have seen them put in backwards a lot.

Brad

[ee904age]

Yeah I've been over the leads 3 or 4 times to check, so thats what I was thinking about the dizzy. If I pull it out, turn the shaft 180 and put it back in it should be ok. Would doing this be any different to taking off the belt, turning the crank 360 deg and reinstalling?

It's gotta be better than the other way thats been suggested, of swapping the leads over on the cap (ie: 1-3 and 4-2)!

[XS1V]

Yup its the dizzy thats out 180 as you are referencing off the crank

Brad

[fivebob]

Would doing this be any different to taking off the belt, turning the crank 360 deg and reinstalling?

Rotating the crank 360° will achieve nothing

It's gotta be better than the other way thats been suggested, of swapping the leads over on the cap (ie: 1-3 and 4-2)!

Why, it's achieves the same thing and it's a lot less hassle to swap the leads, at least to test it out, then you can take the distributor out and rotate it if that solves the problem.

BTW you swap 1&4 and 3&2.

If the distributor has been taken off at any time it is possible that it has be put on 180° out and your cams are actually correctly timed

[XS1V]

^^^ What he said

Brad

[matt dunn]

Rotating the crank 360° will achieve nothing

Was going to say the crank 360 deg out wont matter, as no 1 and 4 will still be at the top?

and the next thing I was going to say is can the dist even go in in the wrong position in relation to the cam?

I thought they were like the 20V and keyed into the back of the cam and offset to only go one way?


if so you should be able to tell if the cam timing is out by putting the engine on TDC and seeing if the rotor is pointing at no1 cyl shouldn't you?

[strx7]

i'm assuming its got an air flow meter right? is it plugged in? is it getting consistant fuel pressure?????

[ee904age]

Okay, Have checked cam timing, put engine at TDC and pulled dizzy cap, its pointing @ #1 on compression stroke. Turned it over again and it fired on two maybe three cyls for about 3-4 secs then died. Theres plenty of fuel getting to the rail and theres definately spark on all four. When Disconnecting coil and cranking then pulling the plugs they're dry with no smell of fuel.

Any ideas people? Other than faulty injectors?
Ive checked for codes and theres nothing.

[Mr Revhead]

i'm assuming its got an air flow meter right? is it plugged in? is it getting consistant fuel pressure?????

It does sound exactly like this
have you tried putting in on diagnostic mode while cranking and seeing there's any faults showing then?

[85AW20v]

Also check that the AFM is earthed correctly as I had the same sort of thing when fitting the 20v into the AW. Could also be something to do with the EFI main relay not wired correctly and stops the fuel pump running once the start signal from the key stops. Use the fuel pump bypass in the diagnostic connector and see if it keeps running.

[hachiroku3]

Theres plenty of fuel getting to the rail and theres definately spark on all four. When Disconnecting coil and cranking then pulling the plugs they're dry with no smell of fuel.

Any ideas people? Other than faulty injectors?
Ive checked for codes and theres nothing.

is your ecu standard? without a signal from the coil to the ecu im pretty sure the injectors wont operate, which would explain why there was no smell of fuel on the plugs.

and when you say theres plenty of fuel getting to the rail, how did you check this? and are you sure your fuel pump is fine? as i have seen plenty of cars with fuel pumps that can pump heaps of fuel when the line is disconnected from the rail, but cant flow enough fuel pressure for the engine to run when its connected.

[ee904age]

It Runs!! By bridging terminals FP & B+ it goes. I'm assuming this points to the AFM not sending a signal and therefor cutting fuel after cranking. The AFM is plugged in, but I notice the plug on the AFM itself has about 8 pins (ish) and the plug on the loom only has four. Do I have the wrong AFM or is it that they use the same AFM for a few different models?

85AW20v: How do I check the AFM earth?

[85AW20v]

Check out a wiring diagram for the SW AFM. I'm pretty sure that on the 20v AFM it was white with a black trace so might be the same on yours.

[iOnic]

It Runs!! By bridging terminals FP & B+ it goes. I'm assuming this points to the AFM not sending a signal and therefor cutting fuel after cranking. The AFM is plugged in, but I notice the plug on the AFM itself has about 8 pins (ish) and the plug on the loom only has four. Do I have the wrong AFM or is it that they use the same AFM for a few different models?

85AW20v: How do I check the AFM earth?

The plug is normal



Do you have any fault codes stored? I doubt it's the AFM that's stopping it from running