31
Tech Tips, Tech Questions / Re: Rear Brakes grinding
« on: October 12, 2019, 02:03:38 pm »
It is the shields. Is it normal for the rotors to move enough to press against the shields? I have bent the shields as far away as I can.
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32
Tech Tips, Tech Questions / Rear Brakes grinding
« on: October 10, 2019, 10:56:52 am »
Hi All,
I have finished with the engine. Now when I test drive I get a very obvious grinding noise from the rear. It could be the parking brake. But how does the parking brake engage the rotor?
Kevin
I have finished with the engine. Now when I test drive I get a very obvious grinding noise from the rear. It could be the parking brake. But how does the parking brake engage the rotor?
Kevin
33
Tech Tips, Tech Questions / Re: Missing Cylinder at idle
« on: September 30, 2019, 09:55:08 pm »
Hi All,
I spent last week in Michigan where I worked alongside a car guy. We talked about valve lash and how it’s set. The nuance about setting lash escaped me. I was encouraged to set the base so the rocker just made contact with the pushrod and to not focus on the spinning sensation of the pushrod as the indicator. I used this approach as I rotated the motor one cylinder at a time, rolling the motor four complete rotations. I used the rotor cap as a visual and the increase in resistance to approximate cylinder position. I used the rocker arm movement to find the zero play point. Once satisfied with the zero lash, I set all valves by a 270 degree additional turn on each nut.
I fired it up tonight and it is purring with just a slight idle fluctuation. I haven’t even set the timing. I may have to pull the manifold apart again because the front valve cover may be leaking. But I have that process down to about an hour now. It sounds so cool.
I spent last week in Michigan where I worked alongside a car guy. We talked about valve lash and how it’s set. The nuance about setting lash escaped me. I was encouraged to set the base so the rocker just made contact with the pushrod and to not focus on the spinning sensation of the pushrod as the indicator. I used this approach as I rotated the motor one cylinder at a time, rolling the motor four complete rotations. I used the rotor cap as a visual and the increase in resistance to approximate cylinder position. I used the rocker arm movement to find the zero play point. Once satisfied with the zero lash, I set all valves by a 270 degree additional turn on each nut.
I fired it up tonight and it is purring with just a slight idle fluctuation. I haven’t even set the timing. I may have to pull the manifold apart again because the front valve cover may be leaking. But I have that process down to about an hour now. It sounds so cool.
34
Tech Tips, Tech Questions / Caliper hex bolt stripped
« on: September 19, 2019, 01:35:50 pm »
I have one stripped hex bolt and no success removing it. I cannot bleed the brakes because the bleed screw is stripped. I have a replacement caliper ready to go in. Tired of messing with all the crusty rust all over and in every nut and bolt. Will I need to remove the whole assembly?
35
Tech Tips, Tech Questions / Re: High Idle
« on: September 11, 2019, 09:31:32 am »
Probably. It’s much better but I am thinking the alternator is also suspect. I have moved on to the brakes for now. Found a significant break in the left front line. Stripped the hard line connector at the rubber line so I ordered new rubber lines for both sides up front. I also stripped the bleeder screw on the front right so I ordered a new caliper. Should have done that for the front left. Running out of money though
36
Tech Tips, Tech Questions / Re: High Idle
« on: September 07, 2019, 09:46:25 pm »
Yes, bad IAC in my case.
37
Tech Tips, Tech Questions / Re: High Idle
« on: September 07, 2019, 09:07:34 pm »
Very good question. Positive difference. Idles better overall, smoother and less variation at the extremes. Adjusts to loads quicker and does not allow the car to approach stalling nearly as far.
38
Tech Tips, Tech Questions / Re: Missing Cylinder at idle
« on: September 07, 2019, 09:05:17 pm »
#1 cylinder is misfiring badly. Plug is wet and black. Can't tell if it's oil or fuel. New injectors all around. I swapped in a used plug and same misfire. Plenty of spark coming from the distributor. Trust me on this one. 
I read compression can be a factor. Could valve lash set improperly also be a factor? Could it cause a compression issue? Guess I should check compression instead of rambling.
I read compression can be a factor. Could valve lash set improperly also be a factor? Could it cause a compression issue? Guess I should check compression instead of rambling.
39
Tech Tips, Tech Questions / Re: High Idle
« on: September 07, 2019, 09:01:24 pm »
IAC swap made a noticeable difference if that helps you at all.
40
Tech Tips, Tech Questions / Re: Stumbling under load
« on: September 05, 2019, 08:21:05 am »
Have you checked the timing?
41
Tech Tips, Tech Questions / Re: High Idle
« on: September 05, 2019, 08:20:07 am »
The same drag on the engine idle occurs when the headlights are turned on. When both lights and fan are on the drag does not double and often if one or the other comes on after the idle has recovered, the drag does not reoccur. This is what got me looking for an idle control issue and not an electrical bug.
42
Tech Tips, Tech Questions / Missing Cylinder at idle
« on: September 04, 2019, 09:43:15 pm »
I believe I have a cylinder that is not firing or I am so unfamiliar with a v6 at idle and I am chasing rabbits and squirrels. Timing light shows all 6 are getting coil voltage. Replaced all injectors. Do I pull plug wires like back in the day or is there a better way?
43
General Fiero Discussion / Re: AeroDONamic test drives
« on: September 04, 2019, 09:38:08 pm »
I am chasing the idle issue when my radiator fan comes on or, my headlights. I am replacing the IAC. If that does not fix then I will start checking grounds but most research is pointing to the IAC. The IAC should adjust the idle if an electrical load taxes the charging system. Bought it off the Fiero store. Rock Auto had the same part but their delivery was too slow.
44
Tech Tips, Tech Questions / Re: High Idle
« on: September 03, 2019, 11:39:17 am »
Oring worked. Big Thanks! Idle is around 900 now. There is a voltage issue though. When the radiator fan starts, the idle is drawn down and the engine wants to stall. I am going to check the grounds. Any ideas?