Im having issues with the sluggy performance of my 96 850R. I had it in the shop for quite sometime with a new paint job, a valve job, timing belt replacement, new oil lines for a refurbed turbo, new air intake, and several sensor replacements. I have no error codes and the car starts right up and idles fine, but pulling out into traffic is scary due to the lack of power. Once I reach about 2500 rpms the turbo spools up and Im off and the car has great throttle response once I get the car moving. I have played with the wastegate adjustment, but still not getting the power I once had. Any suggestions? Could it be a timing issue? Oh, and anybody have an opinion on the effects of ethanol has on this engine?

Thanks for any input..

Try it with the TRACS off, maybe it is acting up.
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'96 855R,'64 PV544 driver, '67 P1800 basket case, '12 XC70, the first three are mine, heh, heh, 525,000 miles put on 10 bricks

With all that work being done there's certainly plenty of opportunity to maybe not get something put back together properly. I would certainly doublecheck the timing belt alignment. Maybe it's off a tooth on one of the camms? What do you mean by "new air intake". Is this just a stock part replacement or a K&N type new system? K&N filters require an oil application on the filter which some folks say can coat the MAS sensor and cause mixture problems. How's the fuel pressure at the rail? Should be around 42 psi. New fuel filter?? Make sure all the vacuum lines are connected and also connected to the right fittings.

Checked all the lines running to the boost solenoid..they are correct but are showing signs of age...kinda gummy. Could the solenoid itself be weak? The new air intake I mentioned is ipd's short ram intake. I mentioned the timing issue and I have yet to see if it is correct. Hopefully, this is something that can be resolved without me dropping a ton more coin..

IPD has a HD boost solenoid which is supposed to bring up the boost at about 2500 rpm instead of 3500, new vacuum lines included.

But I am more concerned that the air/fuel mix is too rich at lower rpm. While the engine is cold, that is supposed to be the case. Not after it has warmed up.
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My name is Klaus and I am a V♂lv♂holic

Klaus,

Got the new solenoid...doesnt come with new lines. In any case, made some difference. Turbo starts to pull around 2700 rpms..still doesn't quite have the wheel spinning power I once had. Oh well, maybe it's just me, but my Moms Glt seems quicker from 0-35. I guess I'll keep tinkering..when I have the time.

Asz

I know what you mean... I was in Colorado Springs (6500ft) and flooring it to get across the road, I almost caused and accident. In that case, it was lack of O2 because of altitude.

In your case, recheck the vacuum lines. Make sure the 3 lines to the booster control solenoid are not only tight but not crossed - wrong hole.

Klaus
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My name is Klaus and I am a V♂lv♂holic

Lack of oxygen because of altitude should not result in much noticeable hesitation for an 850R. Our (midwestern) 1995 850 turbo sedan had plenty of power left even at 14,000+ feet, that is, at Pikes peak, when it was 9 years old with 110k miles.

Almost every car I have owned has climbed Pikes Peak, with power to spare. What we are trying to diagnose is the full throttle application from idle. The sudden infusion of gasoline without the like amount of oxygen results in a slow 'creep' until the rpms get high enough to start the turbo and force air into the system to compensate for the additional fuel.

This should never happen at flat lander altitudes. I suspect the system is already running rich at idle due to other causes: poor timing, manifold leak(vacuum), worn spark plugs, and a host of other items.
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My name is Klaus and I am a V♂lv♂holic