Loss of Engine Power

[rlbjrcpa]

I'm going to try my best to describe this very recent problem I am having with my 78 280z.

When I get up to about 2400 rpms, the car suddenly starts losing power. The tach doesn't drop like when you puch in the clutch, more like no response from the accelerator. If I keep the accelerator down it the car still slows / powers down to the point where it wants to stall. The engine light will flash and the car will start to lurch forward a bit. If I downshift and then give it some - it responds fine, until 2400 again. I can ease through the problem by giving slight gas but then the problems happens again around 3400rpm. I know, not a great description of the problem.

On a side note, the first time I had the problem was right after spraying degreaser on my engine bay and then hosing it off. I covered the fusible links and was careful with the hose. I have to wonder if I somehow caused this.

Thanks - Robert

[spitz17]

Is your vehicle carb'ed or stock EFI?

One of my Zs is doing this as well, and I am currently diagnosing the problem. Many have told me it may have to do with the mechanical fuel pump not pumping enough gas. But I am assuming your vehicle has the electric, which may be malfunctioning?

[LeonV]

Check and clean your TPS and electrical connections. This is SOP with an engine that got wet and then doesn't accelerate.

EDIT: Must've glossed over the part about the 280Z!

Edited November 22, 2010 by LeonV

[Zed Head]

Find the thing in the picture with the green arrow pointing at it (throttle position switch - TPS). Take the black cover off and dry out the insides. Spray it down with WD-40 (water displacement formula #40). Start it with the cover off to make sure it's working. Put cover back on. Don't spray the engine with water again.

Edit: No problemo!

Edited November 22, 2010 by Zed Head

[rlbjrcpa]

It's a 280z with EFI. I'll take the cover off the TPS and dry it out and check to be sure it's working. Thanks for the help. I'll post an update as soon as I try it.

Also learned my lesson regarding the water - no more water on the engine.

Robert