99 nissan altima wont rev over 2000 rpm just did Head Gasket

[thebigz198506]

got a 1999 nissan altima in the shop and just did the head gasket, now with the car all put together it starts and idles great but wont rev over 2g rpm. I have triple checked my timing and it looks good. Have tried tweaking the distributer and double checked all connections everything seems normal. I dont have a misfire which I would think would comeo up if the timing was off, anyone come across this before, any ideas?

Been trying to figure it out all day and nothin, first tech to have the car tho improperly installed the chain and had the intake cam off a tooth car got towed here, took off valve cover and cam sprockets, set cyl 1 to TDC and aligned cams how they should be and reinstalled everything.

Really giving me a headache and issues if anyone can help please reply

[Ozzie]

Sounds like it's running in a limp mode.
Can you check to see if the ECU has thrown any codes?
MAF and O2 sensors connected properly?

[thebigz198506]

Exactly right, i actually figured it out little after posting, was pulling codes when another tech who has worked on these told me that these altimas have a computer that needs resetting.

Let it run for 30 min to relearn fuel/air now drives perfect