m52 power loss at full throttle

[e-dirtym52]

Well its retimed and has a new oxy sensor and spark plugs. Cleaned the fuel system and put sea foam through the intake. Added some fresh gas. Still does the same damn thing. Only throws a purge vlave code that I already have capped off. Time to get new can and crank sensors? That's the only thing left that I can think. Yet its not throwing a code for either one.

[agent]

I'm going to get the vanos doctor kit to reseal the vanos.

Save your money - buy the Biesan kit and DIY.

[e-dirtym52]

I'm almost done retiming the motor and I'm going to get the vanos doctor kit to reseal the vanos. anything else I should check into while it's opened up?

[e-dirtym52]

Not sure what the number is but I'll check. And I popped off my valve cover and my timing is off So hopefully this will fix a few issues

[King Mufasa]

part number of crank sensor?

[chris_rai]

inverted o2 harness plugs, maybe N

[e-dirtym52]

I just went out to check the codes again and it threw an oxy sensor code

[e-dirtym52]

Yea it runs like shit without maf

[NickL]

Gotcha, does the car run any different with the MAF unplugged?

Almost sounds like a timing issue with the loss of power/backfiring.

[e-dirtym52]

Yea. It's an obd1 m52. I should of clarified that. Pink top injectors and I've already replaced the fpr

[NickL]

So you're chipped for the 21.5# injectors?

[e-dirtym52]

413 red label. With trm chip

[NickL]

What DME are you running?

[e-dirtym52]

Yea I've never messed with the timing or anything. Would a failing vanos cause the motor to run rich?

[JCarp90]

Are you sure the cams are timed properly?