Chimaera vacuum reading low? Anyone know ideal reading?
Discussion
My recently acquired ’97 Chimaera 500, has a slightly lumpy idle, I don’t think there is a misfire. I replaced the plugs, cap & rotor arm (with genuine Lucas) at the weekend, and cleaned the stepper motor; HT leads will be next.
…however, when testing the inlet vacuum, the gauge was reading a steady 12.5”hg, I believe a healthy reading should be around 20”hg, (think it should be 15-20, or 20-25?)
From reading through the previous service history, I have no reason to believe there are any funny cams fitted, so expect it to be a normal figure.
Can anybody confirm what vacuum reading these engines should achieve, and should these engines idle perfectly, or am I being pedantic?
Also what should the rpm at idle be? Is currently about 950 – 1000, but sometimes takes a while to come down when pulling up at lights etc, it will fall to 2000, stick for a few seconds, then slowly fall to about 1000.
…however, when testing the inlet vacuum, the gauge was reading a steady 12.5”hg, I believe a healthy reading should be around 20”hg, (think it should be 15-20, or 20-25?)
From reading through the previous service history, I have no reason to believe there are any funny cams fitted, so expect it to be a normal figure.
Can anybody confirm what vacuum reading these engines should achieve, and should these engines idle perfectly, or am I being pedantic?
Also what should the rpm at idle be? Is currently about 950 – 1000, but sometimes takes a while to come down when pulling up at lights etc, it will fall to 2000, stick for a few seconds, then slowly fall to about 1000.
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