Last post on Aug 30, 2011 at 11:23 AM
You are in the Mazda Protege
What is this discussion about?
Mazda Protege, Mazda Protege5, Sedan, Wagon
Mar 26, 2001 (11:12 am)
I remember having a similar problem on my 1991 Ford Escort GT. The 1991-1995 Escorts were built on the Protege chassis, but used Ford engines except for the GT. The GT's used Mazda's wonderful 1.8L DOHC based on the Miata's engine (basically the same engine used on the 1990-1993 Protege LX, and the 1994-1998 Protege ES). I will have to say that Miata-based engine was much smoother (particularly in the upper rev range) than the 626-based 1.8L used on the '99-'00. Anyways, I had a similar jolt (not this extreme, but still unnerving) in that car.
I haven't taken a close look at the compressor pulley, but I would imagine it is spring-loaded for smooth engagement much like a clutch disc is. Perhaps the spring pressure is too hard for idle speeds, as its engagement is hardly noticable at any engine speed about idle.
Mar 26, 2001 (11:20 am)
someone apparently stole the plastic covers that fill the space where the OEM foglights would be off of my 00 ES! Now my front bumper has 2 big holes right next to the radiator opening in the middle . I have no idea when it was stolen, probably a few days before I saw it Saturday morning. My question is, WHY THE HECK WOULD ANYBODY STEAL 2 PIECES OF USELESS PLASTIC???
ughh, not mad, just annoyed. And now that the covers are gone, I'm considering installing the OEM foglights, anybody know a dealership around DC/MD/VA area that does it cheap?
Mar 26, 2001 (11:39 am)
my logic says that the a/c charge after the a/c is running about 10 minutes or more is more than what the engine can handle at idle speeds. Hence the jolt. Reason:
The engine idle is based on feedback system. it does not think in future. so the moment it senses the load, the speed goes up...but alas...we already felt the jolt.
How's my theory?
#116 of 1151 RE:unbelievable
Mar 26, 2001 (12:13 pm)
maybe someone stole his, so you are the first unlucky fella he sees with the Protege? stinks.. now go buy some fogs to fill in the space!!!
#117 of 1151 PRO ES A/C jolt
Mar 26, 2001 (12:22 pm)
so the question is;
does not the low/high pressure sensors check the a/c charge pressure before engaging the clutch?
or maybe there are no low/high pressure sensors in the PRO ES.
Maybe it just cycles every 18 seconds...no matter what the pressures are.
#118 of 1151 divine intervention telling you to buy some fogs
Mar 26, 2001 (12:25 pm)
Sounds like a good excuse/justification to get the foglights without feeling guilty about spending the money on something frivoulous. You just CAN'T leave that big, gaping hole as it is.
#119 of 1151 A/C Pressure
Mar 26, 2001 (3:47 pm)
All A/C systems use high/low pressure switches.
I don't know what to tell you about the jolt. It's hard enough for a tech to diagnose the thing when they are looking at car, much less for a guy who sits behind a desk and has not gotten his hands dirty on a regular basis for a few years now. If I get a good answer, I'll keep you posted.
#120 of 1151 Whistle Sound?
Mar 26, 2001 (5:50 pm)
New item of notice: Has anyone come across a whistling sound (as in an air seal leak) that comes from the engine compartment at highway speeds?
First noticed it the other day and thought it was coming from the sunroof or perhaps the antenna mast. However, I'm able to reproduce the sound at will when on the highway at 3400 RPM (in top gear). Releasing gas pedal pressure diminishes the whistle, increasing pressure brings it back at a very discernable pitch (mostly at 3400 rpm). Almost sounds like a turbo charger but not as pleasing.
Today I tried to reproduce the whistle at lower speeds (in lower gear by turning overdrive off) and at same rpm and sure enough it's there too but not as pronounced.
btw, vehicle is an '01 Protegé ES Automatic
#122 of 1151 maltb....
Mar 26, 2001 (6:40 pm)
I understand your problem...but you own a DX, if I remember correctly. Does it not jolt when a/c engages? (after 10 minutes or more of a/c running? )
I know it's not only me, Jerry also confirms this.
please let us know if it is a pressure switch problem...a wrong one bieng specified may cause it.