No Power After Head Swap

[jewelproject]

i finished doing a a1 to a6 head swap. the motor runs, rough, but i i cant seem to get any power when i put load on the motor. it also starts rough. takes like 4-5x or more to get it started. am i having a timing and ignition issue? i still havent installed the pt6 ecu yet. i just wanted to make sure i could get the motor to run before i put it in. the alt is also still disconnected but i didnt figure that would be in issue. any advice where i should start with fixing the problem(s)?

[dj_ender]

i finished doing a a1 to a6 head swap. the motor runs, rough, but i i cant seem to get any power when i put load on the motor. it also starts rough. takes like 4-5x or more to get it started. am i having a timing and ignition issue? i still havent installed the pt6 ecu yet. i just wanted to make sure i could get the motor to run before i put it in. the alt is also still disconnected but i didnt figure that would be in issue. any advice where i should start with fixing the problem(s)?

sounds like your physical timing is off.

[jewelproject]

what is "physical timing?" like im not on TDC?

[danf20bcb7]

what is "physical timing?" like im not on TDC?

physical is the postistion of your cam gear related to the crank. you might be a few teeth off. sounds like it to. search the timing belt replacement thread, and redo your timing first then go from there.

[jewelproject]

today i made sure i was on TDC on everything. now the motor wont start. its getting spark and fuel. yesterday i got it to start but it sounded rough. today no go. any advise? maybe check for codes? my exhaust except for headers is off but that shouldnt effect it from starting. could it?

[mondojackal]

Agreed with Dan. Check the timing on the belt.

I don't think the A6 ECU is hurting you. The motors aren't much different at idle.

*edit*
Hmm.. when you checked the timing, did you change anything?

[jewelproject]

Agreed with Dan. Check the timing on the belt.

I don't think the A6 ECU is hurting you. The motors aren't much different at idle.

*edit*
Hmm.. when you checked the timing, did you change anything?

have not put the pt6 ecu in yet. do you think that would help? i didnt think i would need it yet. just trying to get the motor to run first. i noticed i was off by a little on my balance shaft. fixed. but no changes.

[deevergote]

It should run well enough on either a PT3 or PT6. The symptoms STILL sound like your valve timing is off.

Try doing a compression test.

[N9netwoAccord]

Agreed with Dan. Check the timing on the belt.

I don't think the A6 ECU is hurting you. The motors aren't much different at idle.

*edit*
Hmm.. when you checked the timing, did you change anything?

HOLY SHIT where the hell have you been?!

[evil_demon_01]

Did you install the dizzy correctly, not 180* out?

There are too many variables.
Did the head you fitted come off a running engine?
Have you done a compression test?
Were any valves bent before you fitted the head?
Did you fit a new head gasket?
Did you adjust the valve clearances?


As above, your timing sounds off.
- http://www.cb7tuner.com/vbb/showthread.php?t=189795
Was your cam pulley pointing up with the two marks flat to the head?

[mondojackal]

HOLY SHIT where the hell have you been?!

Hahaha! What's up, man? not trying to thread-jack, but I've gone through quite a few cars since I left here. Getting married soon, and thinking about kids down the road, so I'm thinking about trying to find another Accord.

[jewelproject]

Did you install the dizzy correctly, not 180* out?

There are too many variables.
Did the head you fitted come off a running engine?
Have you done a compression test?
Were any valves bent before you fitted the head?
Did you fit a new head gasket?
Did you adjust the valve clearances?


As above, your timing sounds off.
- http://www.cb7tuner.com/vbb/showthread.php?t=189795
Was your cam pulley pointing up with the two marks flat to the head?

let me rewind some...yes took the head off a running motor(my 93ex). when i removed the head i kept the cam installed along with rocker arm assembly. i took this advise by a friend(hope is was a good one). well since it started(after many turns of the key) and ran yesterday. i figured my dizzy was installed properly, just needed to time it properly afterwards. so no, today i did not mess with the dizzy. i did not do a valve adjustment since i took the head off as a whole piece. i have not done a comp test. will do it. i installed a brand new head gasket set, havent sprung any leaks. i did a lot of resetting TDC on everything with TDC markings today. yesterday start, today no start. what gives?

[deevergote]

All the TDC marks match up, but were you sure to put cylinder 1 at TDC, not just point the marks up?

[jewelproject]

All the TDC marks match up, but were you sure to put cylinder 1 at TDC, not just point the marks up?

when i took the belts off i set cylinder 1 with the flywheel markings. i set the balance shaft, oil pump and last the camshaft at TDC. then installed the belts.

[wed3k]

when i took the belts off i set cylinder 1 with the flywheel markings. i set the balance shaft, oil pump and last the camshaft at TDC. then installed the belts.

but did you put the head to tdc prior to setting it back on the motor. if you torqued it down with the valves open in the wrong cylinders then you may have bent valves.

when you crank it, does it sound like all cylinder are holding compression?