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Forum: Tech / General Engine
02-13-2011, 03:53 PM
Replies: 8
Views: 2,012
Posted By IROC343

Re: Can someone please tell me what this sensor is?

My 87 TPI has that sensor. Screws into the EGR base.
Forum: Tech / General Engine
01-01-2011, 07:50 AM
Replies: 6
Views: 1,896
Posted By IROC343

Re: Removal of engine mounts 88" TA

You can get at them through the holes for the lower control arms without removing the control arms. You have to have the right combination of wrenches, but it can be done. Not the easiest job, but...
Forum: Tech / General Engine
12-29-2010, 03:33 AM
Replies: 10
Views: 831
Posted By IROC343

Re: Question about a set of Aluminum Rocker Arms

Inside the lifter body there is a piston. this piston rides in a bore, when the engine runs the bore is filled with oil under pressure. The piston rides on top of this cushion of oil. Under high...
Forum: Tech / General Engine
12-28-2010, 04:35 PM
Replies: 10
Views: 831
Posted By IROC343

Re: Question about a set of Aluminum Rocker Arms

If you understand how a hydraulic lifter works, you'd understand why 1/4 turn is fine. If you feel better with 3/4-to 1 turn then go ahead and adjust it that way. I'd rather adjust them with the...
Forum: Tech / General Engine
12-25-2010, 09:33 AM
Replies: 4
Views: 654
Posted By IROC343

Re: Ordered this...

As long as you know you've got 5 quarts of oil in the pan, this shouldn't have to lay you up until you find a replacement.
Forum: Tech / General Engine
12-25-2010, 09:28 AM
Replies: 10
Views: 831
Posted By IROC343

Re: Question about a set of Aluminum Rocker Arms

There are many ways to do this, engine running or not. What I have found easiest is to replace them per cylinder. Turn the engine over by hand and watch the rockers, do the intake when the exhaust...
Forum: Tech / General Engine
12-25-2010, 09:14 AM
Replies: 17
Views: 5,613
Posted By IROC343

Re: After i hit a curb

Take it somewhere and get it aligned, if it pulls or wanders it obviously needs done. A good alignment mechanic will soon see what's wrong.
Forum: Tech / General Engine
12-11-2010, 06:43 AM
Replies: 12
Views: 6,770
Posted By IROC343

Re: ***URGENT*** BOLT SNAPPED IN CRANK SNOUT

The thread size is 7/16-20 it's a fine thread. If you're buddy forced a 7/16-14 head bolt in there and broke it off, you're in for a real fight. If this is just a driver and the balancer is a good...
Forum: DIY PROM
11-28-2010, 05:48 PM
Replies: 15
Views: 3,391
Posted By IROC343

Re: Chip/Prom Burning?

Wow, lots of good information, but it's way over my head at this point. I haven't even got my autoprom yet. The wide-band O2 sensor, is this a separate system for the sole purpose of measuring air...
Forum: DIY PROM
11-28-2010, 05:12 AM
Replies: 15
Views: 3,391
Posted By IROC343

Re: Chip/Prom Burning?

Thanks again for all the help. I already ordered the Autoprom and the adapter from Moates.net. Can't wait for it to come and get started. I have a custom chip in there now and the car runs good,...
Forum: Tech / General Engine
11-27-2010, 04:51 AM
Replies: 1
Views: 586
Posted By IROC343

Re: knocking only when cold started. on a cold day

It's most likely piston slap, small blocks are notorious for it. The clearance between the piston and the cylinder wall allows the pistons to "slap" the cylinder wall making a knocking noise. Once...
Forum: DIY PROM
11-27-2010, 04:40 AM
Replies: 15
Views: 3,391
Posted By IROC343

Re: Chip/Prom Burning?

Thanks GTA Sammy, that's the info I was looking for. I went to the Moates site, but I couldn't get a grasp as to what I needed to get started.
Forum: DIY PROM
11-26-2010, 10:21 AM
Replies: 15
Views: 3,391
Posted By IROC343

Chip/Prom Burning?

I have a 87 IROC that I've installed a GMPP 383 with the original MAF TPI and a long list of perf parts and I would like to be able to learn to burn Proms in the hope I can fine tune it and make it...
Forum: Tech / General Engine
11-26-2010, 09:10 AM
Replies: 1
Views: 436
Posted By IROC343

Oil Cooler?

I eliminated the factory oil cooler when I replaced the original 305 with a 383. I figure I saved about 10-15lbs (including coolant), eliminated two possible sources for leaks, and although I'm not...
Forum: Tech / General Engine
11-20-2010, 05:24 AM
Replies: 14
Views: 2,249
Posted By IROC343

Re: TPI VACUUM PROBLEM

Make sure you used the right gaskets in the right places. Most of these intake sets are universal, they include several gasket combinations, for the early and late TPI setups. It's easy to use the...
Forum: Tech / General Engine
11-20-2010, 05:14 AM
Replies: 15
Views: 819
Posted By IROC343

Re: I give up

I think the problem is solved. Going over things I found two bolts loose on the ram tubes to the lower base. I evidently missed them during the tightening process when replacing the injectors. ...
Forum: Tech / General Engine
11-16-2010, 05:45 AM
Replies: 15
Views: 819
Posted By IROC343

Re: I give up

Yes, the advance seems to work fine. Somebody at work suggested maybe the knock sensor is faulty. Could the knock sensor retard the timing enough to make the engine falter to the point it wouldn't...
Forum: Tech / General Engine
11-15-2010, 07:46 AM
Replies: 15
Views: 819
Posted By IROC343

Re: I give up

With the est disconnected the timing at idle is 6 degrees btdc per factory specs. Some of the vacuum lines are original, a little soft maybe, I'll change them and see if that helps. Thanks for the...
Forum: Tech / General Engine
11-12-2010, 10:33 AM
Replies: 15
Views: 819
Posted By IROC343

Re: I give up

No codes no SES light. Light does work.
Forum: Tech / General Engine
11-12-2010, 07:16 AM
Replies: 15
Views: 819
Posted By IROC343

Re: I give up

The TPS is set to .54 and I know the IAC is working fine, because when I powerbrake it, if I can catch it before it dies the idle goes to 2000rpm before it settles back to about 750rpm.
I'm...
Forum: Tech / General Engine
11-11-2010, 04:40 PM
Replies: 15
Views: 819
Posted By IROC343

I give up

91 firebird, 305 tpi, auto, 98,000 mi. About three weeks ago car quit, towed home, convinced myself it was the fuel pump (original), replaced fuel pump (ac delco) now has 40psi. Cranks fine would...
Forum: TPI
10-29-2010, 08:58 AM
Replies: 3
Views: 533
Posted By IROC343

TPI Performance ?

I have an 87 IROC that I have installed a GMPP 383 engine with GM aluminum vortec heads. I have installed a comp cams cam, vortec TPI base, Edelbrock runners, Accell cdi ignition, Motovation custom...
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