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Old 07-23-2007   #41
Arrow
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Re: hard start and intermittant miss

Quote:
Originally Posted by Stephen
Sorry for hijacking your thread.
What he said.
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Old 07-23-2007   #42
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Re: hard start and intermittant miss

Quote:
Originally Posted by Arrow
What he said.
No problem, always interesting to see how these things evolve. I will update when I get the parts replaced later this week. Presently have to fit the car stuff in between building a deck and porch for the "boss".
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Old 07-23-2007   #43
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Re: hard start and intermittant miss

Was going thru the GM shop manual today and one of the things they ask you to do, for this type of problem, is to disconnect the MAF and see if the engine starts and runs. Well, I gave it a try and it started and settled down pretty quick. Plugged it back in and it started , stumbled and stalled. GM says to replace the MAF if this occurs. Anyone tried this? Was pricing MAF's and the Granatelli MAF looks decent (especially price). Anyone use this MAF? Any comments regarding this MAF?
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Old 07-23-2007   #44
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Re: hard start and intermittant miss

What a simple thing!

Have you considered a used, stock MAF?
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Old 07-23-2007   #45
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Re: hard start and intermittant miss

Quote:
Originally Posted by Stephen
What a simple thing!

Have you considered a used, stock MAF?
I would welcome a good used stock one. How can you tell if a used one is good? Car is basically stock, no racing, just a cruiser.
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Old 07-23-2007   #46
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Re: hard start and intermittant miss

how much is the granatelli unit? i might have one for sale here real soon if you're interested in a used unit. i'm switching to SD here in the next week or so.
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Old 07-23-2007   #47
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Re: hard start and intermittant miss

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Originally Posted by MunsonGTA
how much is the granatelli unit? i might have one for sale here real soon if you're interested in a used unit. i'm switching to SD here in the next week or so.
They are around $289. I can get a rebuilt for a lot less (around $150 or so), but I am not sure I would trust a rebuilt.
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Old 07-23-2007   #48
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Re: hard start and intermittant miss

I've wondered the same thing, short of putting it on a good car, I have no idea. Because the 89 GTA I bought, still had one in it.

The car was running fine, but the guy I bought the car from had grand plans, pulling out the interior, engine, and transmission, then ran out of steam, and bailed.
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Old 07-24-2007   #49
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Unhappy Re: hard start and intermittant miss

The 305 TBI IAT sensor showed up today. Next rainy day ( Thursday?) it gets installed. I checked the thread and it is a 3/8" pipe thread, no nut for that. However, I have a 3/8" union that I can cut down to act as a nut. Some blue locktite and should be ready to go. I plan to install it before the MAF. That way if the nut ever works loose, the screen in the MAF will keep it out of the engine. Still thinking about a used MAF or going for a new one. NAPA can get me a new one for $240. They actually did not recommend their rebuilt one, they have had several defective ones. It would be just my luck to get a defective rebuilt and have the same problems and not be sure what was wrong. Wish there was someone close by that I could swap the MAF with and see if the problems move with the MAF.

Last edited by george88gta; 07-24-2007 at 04:32 PM.
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Old 07-24-2007   #50
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Re: hard start and intermittant miss

I put 2 big washers, one inside, one outside, instead a just relying on the nut and sensors small surfaces, to hold it.
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Old 07-24-2007   #51
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Re: hard start and intermittant miss

Quote:
Originally Posted by Stephen
I put 2 big washers, one inside, one outside, instead a just relying on the nut and sensors small surfaces, to hold it.
Good point. I plan to get it installed in the bottom of the first rubber intake hose, the washers will definetely help.
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Old 07-24-2007   #52
bill martin
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Re: hard start and intermittant miss

could this sensor make the car hard to start when hot?my 88 started to get hard to start last week when hot. you have to apply a little gas then it will start
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Old 07-25-2007   #53
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Re: hard start and intermittant miss

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Originally Posted by bill martin
could this sensor make the car hard to start when hot?my 88 started to get hard to start last week when hot. you have to apply a little gas then it will start
I think you will see the most improvement from this mod on hot engines. It may help with a cold engine, but I am betting that it wont help much, unless you have a defective or dirty sensor in the plenum. A lot of junk goes in there from the PCV system and collects on the inside of the plenum and the sensor as well.
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Old 07-25-2007   #54
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Re: hard start and intermittant miss

Quote:
Originally Posted by george88gta
I think you will see the most improvement from this mod on hot engines. It may help with a cold engine, but I am betting that it wont help much, unless you have a defective or dirty sensor in the plenum. A lot of junk goes in there from the PCV system and collects on the inside of the plenum and the sensor as well.
Other than my cat back, my 350 is stock, wi150k miles. Performance improvement? Not really. But, my mpg has gone up. Cold starts have gone WAY up. Now, when I hit the key, it feels like it starts within 1 full revolution. Whereas before, it was cranking a full 3-5 seconds before starting, before I moved my IAT sensor. Hard to believe, but all I know is what it is doing now, compared to before.
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Old 07-28-2007   #55
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Re: hard start and intermittant miss

Quote:
Originally Posted by Stephen
Other than my cat back, my 350 is stock, wi150k miles. Performance improvement? Not really. But, my mpg has gone up. Cold starts have gone WAY up. Now, when I hit the key, it feels like it starts within 1 full revolution. Whereas before, it was cranking a full 3-5 seconds before starting, before I moved my IAT sensor. Hard to believe, but all I know is what it is doing now, compared to before.
Spent a few hours on the old girl today. I had a reman distributor laying around so I put the new AC Delco module in the distributor and installed. I also used a new Delco cap and rotor. While doing the install, I noticed that one of the EGR solenoid vacumn lines was split. Figured that was an underlying cause to my problems. Fixed that and reloacted the IAT sensor to the intake hose in front of the MAF. Started it up and adjusted the timing to 8 degrees advanced. Something new happened here. I recieved a damn good shock when I tried to turn the distributor. Never happened before. I must have damaged the wires when I was doing the test that has you remove the wires one at time, with the engine running. You use insulated pliers. I must have damaged the rubber boots. Anyway, I took it for a long ride, seems to run a bit better, but still starts hard. So now it is time for new wires and I have to decide on a MAF (new or used). Oh Yeah, and a big bottle of Maalox.
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Old 07-28-2007   #56
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Re: hard start and intermittant miss

Way to go!

When I was 16, I needed to kill an engine real quick, so I reached up, bare handed, and pulled the coil wire from the distributor cap

About 5 seconds later, I was actually able to let go of it (or I was thrown loose, not sure) but the "dancing" finally stopped, and I found myself a few feet away, flat on my back, on the driveway!

Only takes ONE TIME to learn not to do that!
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Old 07-28-2007   #57
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Re: hard start and intermittant miss

Quote:
Originally Posted by Stephen
Way to go!

When I was 16, I needed to kill an engine real quick, so I reached up, bare handed, and pulled the coil wire from the distributor cap

About 5 seconds later, I was actually able to let go of it (or I was thrown loose, not sure) but the "dancing" finally stopped, and I found myself a few feet away, flat on my back, on the driveway!

Only takes ONE TIME to learn not to do that!
I have a better story. I was working as a gas station attendant and one rainy Sunday afternoon, a guy pulls in with his engine barely running. I open the hood and you can watch the spark flash down the side of the coil. As luck would have it, the village idiot was hanging around and asked if he could light a cigar with that spark. We told him no, but there are some folks you cant tell anything. So he proceeds to lick the cigar, to get it nice and damp and leans forward under the hood. Needless to say the ground was wet. As he gets close to the coil, the spark decides it has found a better path to ground and travels up the cigar and in to the idiots teeth. He smashed his head against the hood, drops the cigar and falls on the ground in pain. Of course, since we were all kids at the time, we just stood there laughing. Sure wouldnt want to do that with todays high output ignition systems.
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Old 07-28-2007   #58
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Re: hard start and intermittant miss

Question regarding plug wires. I prefer over the valve cover installs. That is what I have now. I used MSD 8.5mm wires, but I always felt as if they never really locked on to the plugs. They always seemed loose. I was thinking of switching over to Taylors with the dual lock. Anyone used these wires on a GTA? Any issues with trying to get them locked on to the plugs or removing them?
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Old 07-29-2007   #59
FearThisGTA
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Re: hard start and intermittant miss

I have Taylors on my Dodge and they seem to be holdin up pretty good after a havin them on there for a few years now.
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Time of Death on motor, 4:07pm on 05/29/2010.
Hp:211.2@4200rpms/Tq.328.5@2700rpms
Best et: 13.959@97.05mph
Best mph: 98.3
Best 60' : 1.875 on BFG Comp TA's w/ 32 lbs of air in them
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Old 07-29-2007   #60
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Re: hard start and intermittant miss

Quote:
Originally Posted by Stephen
Way to go!

When I was 16, I needed to kill an engine real quick, so I reached up, bare handed, and pulled the coil wire from the distributor cap

About 5 seconds later, I was actually able to let go of it (or I was thrown loose, not sure) but the "dancing" finally stopped, and I found myself a few feet away, flat on my back, on the driveway!

Only takes ONE TIME to learn not to do that!


I did the exact same thing. It only takes once.
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1991 GTA Trans Am
w/305,231 miles
on the original motor!!!!
Time of Death on motor, 4:07pm on 05/29/2010.
Hp:211.2@4200rpms/Tq.328.5@2700rpms
Best et: 13.959@97.05mph
Best mph: 98.3
Best 60' : 1.875 on BFG Comp TA's w/ 32 lbs of air in them
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