replaced head, now hesitates and misfires

[cm1024]

not sure where else to post this without gettin bashed, but newbie sounds bout right since im sorta new to dsm's but not to imports.
well anyway, i bought my 91 talon tsi fwd for $1,000 at the time ### it wasnt running. so i got it running, noticed it had several problems, including major exhaust leak from the head n exhaust manifold (was warped come to find out), it had many studs broke off in the head, n some rigged up wiring where somebody tried splicing the coolant temp sensor into the o2 sensor?
but to skip ahead a bit, i ended up just gettin another head n replaced the old. well before it would run fine but had problems, now it'll crank n idle fine but u can floor it n it takes a few seconds for it to even respond then takes forever for it to even get up to 3-4k rpm while misfiring like crazy. my guess is that my bro-in-law might've knocked timin of a few ticks while puttin the belt back on, other than that im bout clueless. any ideas?

 

[92AWDHX40]

Recheck your timing.

 

[cdvip]

I agree re check timing.

 

[bjmauck]

Check timing and on the cam gears put something strait from bolt to bolt then your timing marks should be under that.

 

[cm1024]

thanks guys. we planned on setting the timing again today, but got rained out. i'll keep u guys updated. been dying to drive this thing since i bought it but had so much work to do on it

 

[joat09]

I can bet its your timing. If its right do a compression test.

 

[herms99gst]

What?

 

[cm1024]

whats up herms?

 

[BogusSVO]

When you did the head swap, on the head you installed, did you remove the cams or HLAs? if so, did you blead down the HLAS?

 

[cmfd]

Check your plug wires and timing

 

[cm1024]

what exactly is the HLAS? i pulled my valve springs, n cams because i had to reuse those. i had valves that came with the head, that i used because the newer one was fresh from the machine shop. i didnt reuse the old valve seals if anybodys wondering

think i answered my own question, its what the rocker arm sits on besides the valve spring so basically a lifter? i didnt bleed em down, not sure how to even, i dont remember anything like that in the book but i did pull the head bout a week before i could even get the old head on so my memory is a little blah...
but i did have to use those out of the old head also, i did make sure to put the ones out the old head in the corresponding spots on the newer one. i tried goin by the book as much as possible, but i could have missed something

 

[92gvr488]

Check timing first, then cam timing( assuming they are adjustable),Then a compression test. Did You lap the valves when u swapped them?

Also, what plugs are you running? I had this same problem and it turned out to be plugs and the valves would'nt ceet properly... I changed to NGK's and lapped the valves and never had another issue from it...

 

[cm1024]

I've got ngk plugs and wires. They're pretty new and I've checked the gap. I have not lapped the valves, I just used the valves that came with the head

 

[bryanwheat]

I've got ngk plugs and wires. They're pretty new and I've checked the gap. I have not lapped the valves, I just used the valves that came with the head

Did you put them back in the hole that they came out of? Did you leak test the head after re-assembling it? Have you verified the timing marks yet? Have you dome a compression test?

 

[cm1024]

Well reset timing and all is good, its just overheating whenever it sits at idle. Not real sure why, but it runs great now just a lil rich according to my a/f ratio gauge
That n I'm over boosting if I let the rpms get to high, trying to tone it down with my mbc but it doesn't look like its helping any