Phil Hyde

Here is the confusing part to me. If the CTS is reading the correct value when cold, then how could a faulty part be causing the issue?

What is the consensus on a replacement MAF for a 1991 EA82? Subaru parts seem scarce - only found them on eBay. Is aftermarket over the counter sufficient? Auto zone, NAPA, etc?

Can a MAF be tested by a shop? I don't object to buying a replacement, but I don't want to plunk the money down only to find it wasn't the problem. I've seen some testing procedures on YouTube but since my car won't idle it's a moot point.

Dunno if this is yours but I found it here.

Thanks - it does seem like the obvious conclusion, doesn't it?

UPDATE: Cleaning the MAF had no effect.

Also, I noticed this connector not attached to anything, and nothing obvious in reach. Any ideas what it's for?

UPDATE: I unplugged the MAF sensor and the car started right up. Maintains a ~2K idle and does not die. So, bad MAF?

If this is the CTS (arrow), resistance at the connectors (red box) resistance seems in range from what I've read. Ambient about 72F right now.

I did a little searching and found reference to checking the CTS. Seems like an easy check?

Thank you. Is the CTS easy thing to check? As in with a voltmeter? According to the previous owner, the fuel pump and filter are new. I know that doesn't mean the pressure is good, just a data point. As for the other questions, sounds like I am going to need to check the trinity (fuel/air/spark) systematically.

Thanks for the suggestion. Would a bad coolant sensor cause major drivability issue? I drove her to the back of my property. You have to get on the throttle pretty heavy and keep pumping it for it to gain and keep RPM. Seems to me like a fueling problem but that is also nebulous.

Hi everyone, I recently purchased a 1991 Loyale 1.8L with SPFI. When it starts, it will idle, but the RPM's slowly creep down. "Feathering" the throttle will get it to rev, but it's unreliable. The previous owner says this is likely the throttle position sensor. Does that sound right or could it be something else? Thanks in advance for any pointers!