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Re: Brake lights, Head lights, Base Boost oh my! Posted by Ari [Email] ![]() ![]() In Reply to: Brake lights, Head lights, Base Boost oh my!, Left, Wed, 2 Jul 2008 09:02:47 Members do not see ads below this line. - Help Keep This Site Online - Signup |
If the boost gauge isn't moving, it's not a case of base boost. If the needle just sits there at the gap between the top of the white and the begining of the yellow band, the answer is simple - the hose to the boost gauge fell off. That line is atmospheric pressure. At idle, the gauge should be low down in the white (vacuum). Yellow is boosting. The most likely culprit is the 'T' near the firewall, where the thin hose from the APC/BCV joins the thin hose from the intake manifold, and a third thin hose that goes into the firewall. That third hose goes to the boost gauge. My guess is the hose got dry and brittle, and broke off. The car will be down a little on power because you're pushing pressurized air into the engine compartment, not the engine.
As to the brake lights, yes, a bad ground can cause that issue. I'd look at the tail lights. If the tail light ground is bad, when you press on the brake pedal, the voltage goes through the brake lights, and instead of into the ground, it goes back up through the parking lights. So what? The parking lights and the headlights come from the same headlight switch. So you're powering everything weakly through the tail lights.
First, if you've replaced any bulbs, make sure you're replaced dual filament bulbs with dual filament bulbs. If no bulbs have been replaced, pull back the carpeting at the tail lights at the back. You'll see a black wire coming out of the harness that goes go a lug on the chassis. Unbolt it, polish up both surfaces and bolt back down. You may also have a bad connection of that black wire where it joins the circuit board of the tail lights. I've actually been known to solder an extra wire (thick stranded, like 16 gauge) to the ground on the circuit board, crimp on a lug, and bolt it to chassis as an extra path. Check both sides.
posted by 192.249....
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