7MGTE Woes Input Appreciated (Problem Solved you'll never guess how)

[BlackSupra]

Did you re-attach all the earth straps properly?

Maybe check the alternator voltage too when your riding the clutch.

[ed]

as we spoke about on the phone stitty - id be checking for spark failure as load goes up off idle

[TheStitt]

well thanks for the input guys as per ed and matt im going to check the coli paks and ignitor tonight, I don't have time before work to print off the tps manual so if the ignition side fails tonight I'll try that

Glenn all earth straps should of been done up howver I'll check that to
I may need to add some me thinks to

[Maverick]

Fuel Pump perhaps????

although the problem is surely the "7M" part of the engine code (lol)

i reckon it`s either your fuel pump or as others stated your coil pack or whatever the hell it uses for ignition

[BlackSupra]

well thanks for the input guys as per ed and matt im going to check the coli paks and ignitor tonight, I don't have time before work to print off the tps manual so if the ignition side fails tonight I'll try that

Glenn all earth straps should of been done up howver I'll check that to
I may need to add some me thinks to

check the earth from the coilpacks to the head.

[TheStitt]

Well

I had the timing cover off this arvo just to check it all re sat the dizzy etc. Tried to start it with timing light on the car no spark. I changed coil packs, no spark. I changed ignitors and yep no spark

the replacement ignitor and coil packs came from a running car.

I have the trouble shooting section of the manual however I didn't have multi metre out at rivo so I couldn't check it all.

I have now borrow another ecu so i'll try that this arvo.

Maverick, I don't think it is fuel as the car back fires and farts when load was coming on, fuel was getting in cause it was burning in the manifiolds and not the cylinders.

Glenn yeah i have almost ben caught before with the earth lead on the coil packs. I can tel you it was on on both coil packs I used today.

[kuchie]

Have you checked the "check engine" light for any faults?

TPS fault might show up then. I had my Throttle sensor not working, which resulted in a fault code being showed, however it always seemed fine at idle.

[TheStitt]

Conversion.

I don't have a check light

I'll probab have to wire one in or I will check the TPS this arvo with my multi metre

can you tell from my posts I work 11 hour days

[whatthe?]

Did you get my CAS from Linden and try that?

[TheStitt]

Well

I tried the second ECU this morning no luck stil nothing no spark what so eva.

When I got back to the car this arvo I swapped back to my ecu and ignitors and coils and low and be hold it started and ran.
however still with the same prob. Not wanting to run under load.

it still kicks and bucks and backfires with load it can't even get above idle.

No i haven't tried the CAS I will grab it tommorrow night and test it and the TPS on thurs night

[hamgatan]

actually i suspect its more AFM wiring related. its got that feel as if you were revving up an engine with rooted carbies right? where it will splutter and die if its cold?

since youve had the head off it recently.. i would be checking all the wiring to the AFM. the AFM itself may be fine, but the wiring for it remember goes back over to the block then inside and around the back of the cam belt cover in between the head and out the other side... maybe theres a snapped wire inside here or ones pulled loose or something. id check that first to make sure you have continuity of current down your AFM wiring..

[crowncustom]

Now this might be a stupid suggestion but here goes,can the cams in the 7M be swapped over?I seen this done on a European car I worked on many years ago not sure of make but someone had swapped the cams over(inlet to exhaust and exhaust to inlet)and it done much the same as what your Crown is doing.I'd even do a thorough check on your cam timing again just to be positive everything is lined up spot on.Also check the keyway that holds your cam gears on hasn't stuffed up causing the gears to move out of time.
Cheers Brett.

[CrUZida]

Brett, all Toyota engines with a dizzy/cas run the dizzy/cas off the cam.
So if you put the wrong cam in the exhaust, the dizzy wont turn, and she won't run.


Luke, I'd TRIPLE check both cam timing and ignition timing.
If you can rev it high enough to operate the BOV, then I can't see it being a fuel/air/spark issue.

Run the compression tester over it all too, something for peace of mind.

Timing while locked should be set at 10deg, or 12deg if you are running 98.

[TheStitt]

hangman. Engine with no load behaves as normal starts and runs no probs and is smooth as, as soon as the clutch is realeased is farts and dies.

Brett peewee, I checked timing and set it at 7 deg. I did have so issues with it though. When I lined up the dizzy to the notch in its houseing the timing seemed very retarted about 15 deg.

What ended up happening was that i put it in with the end cap off timer make sure were it lined up. I've since though about it abit more, i'm thinking along the lines of brett maybe the head place didn't put the cam gears on in the right orinetation. Maybe they put the pin in the wrong hole. I'm not sure because I didn't think to check when I assembled the motor or when I haed the timing covers off to triple check the timing.

What i will do tommorrow night is check the position of the cam gears on the cams, preform a comp test and see how that goes, I will also check the airflow meter and wiring however with it being able to rev off load I'm not sure that that is prob

more as it unfolds

Stitt

[TheStitt]

well last night I hit the wagon, found that it is loosing all spark when i gets loaded up.
This was measured on both no 1 and no 5 cylinders with a timing light (in linew with the lead).

Spark also was breaking down when a different CAS, ignitor, coil pack and ECU was used. All progressivly swapped in.

We also tested the airflow metre with a volt metre and it failed. Maybe thats it not sure

wil keep it up to date.