Ported or just bad idle?
#1
Just cruising
Thread Starter
Join Date: Oct 2004
Location: Weirton, WV
Posts: 602
Likes: 0
Received 0 Likes
on
0 Posts
Ported or just bad idle?
I found another 7 about an hour away from home. The body and inside are in really, really nice condition. The engine starts right up but it idles funny. It bounces between between 800 and 1000. The owner tells me that it is supposed to run like that because it has been ported.
The 7 is a 1990 T2. It has a RB 3 inch exhaust, RTek 1.8, 720 cc injectors and a fuel pump from a 3rd gen 7. No emissions. Its a 5 speed and supposedly has been rebuilt within the last 3 k miles.
Would the porting cause it to idle bad or is it just another bad idling 7?
ashley
The 7 is a 1990 T2. It has a RB 3 inch exhaust, RTek 1.8, 720 cc injectors and a fuel pump from a 3rd gen 7. No emissions. Its a 5 speed and supposedly has been rebuilt within the last 3 k miles.
Would the porting cause it to idle bad or is it just another bad idling 7?
ashley
#3
Resident Know-it-All
iTrader: (3)
does it have a boost gauge? if so, what is the vacuum reading at idle. It should only lope badly at idle if it is a really extreme port, and more than likely it is something out of adjustment.
Are you in morgantown? I didn't think there were any more rx7 people here anymore...
Are you in morgantown? I didn't think there were any more rx7 people here anymore...
#4
Just cruising
Thread Starter
Join Date: Oct 2004
Location: Weirton, WV
Posts: 602
Likes: 0
Received 0 Likes
on
0 Posts
does it have a boost gauge? if so, what is the vacuum reading at idle. It should only lope badly at idle if it is a really extreme port, and more than likely it is something out of adjustment.
Are you in morgantown? I didn't think there were any more rx7 people here anymore...
Are you in morgantown? I didn't think there were any more rx7 people here anymore...
So, is this guy just giving me a bunch of BS?
I'm from Weirton, northern panhandle. I've been on here since my Dad bought me my first 7, for my 16th birthday, about 7 years ago. I've had 5 different 7s and I kept one for two years. I have a 1990 GXL/T2 swap that I've been trying to get on the road for 9 months.
thanks for the reply, ash
Trending Topics
#10
Just cruising
Thread Starter
Join Date: Oct 2004
Location: Weirton, WV
Posts: 602
Likes: 0
Received 0 Likes
on
0 Posts
The present owner swears that it has idled like that since he had it rebuilt. He says he was told by the builder that it has an "aggressive street port".
The boost gauge is attached to the intercooler tubing right after the throttle body. Its connected to the tubing between the throttle body and the FMIC.
Another thing, it doesn't have a boost pop-off valve. He said that it wasn't needed.
I went to look at it again today. Its really, really nice and my favorite color - red. Of the five 7s that I've had so far, all five have been red.
Today he said the engine was just rebuilt within the last 500 miles. I thought yesterday that he said 3k miles.
The boost gauge is attached to the intercooler tubing right after the throttle body. Its connected to the tubing between the throttle body and the FMIC.
Another thing, it doesn't have a boost pop-off valve. He said that it wasn't needed.
I went to look at it again today. Its really, really nice and my favorite color - red. Of the five 7s that I've had so far, all five have been red.
Today he said the engine was just rebuilt within the last 500 miles. I thought yesterday that he said 3k miles.
#11
not a drifter
iTrader: (133)
i went and looked at a car a few weeks ago that the owner said the same thing. it was surging about 1000 rpm during idle. he said it was normal because it was a rotary and that they all did that. i unplugged the TPS and it smoothed right out. it's something simple to try and worth a shot.
agreed.
agreed.
#12
Full Member
[/QUOTE]Today he said the engine was just rebuilt within the last 500 miles. I thought yesterday that he said 3k miles.[/QUOTE]
The owner might be full of it. Watch out.
The owner might be full of it. Watch out.
#13
Full Member
When I was shopping around for rx-7's I found that for a lot of people "rebuilt" can mean anything, right down to "I changed the spark plugs".... so unless there are dated receipts don't believe a word of it.
#14
Full Member
iTrader: (1)
Join Date: Mar 2009
Location: California
Posts: 54
Likes: 0
Received 0 Likes
on
0 Posts
possibly a frew things wrong with it that has been covered by others here. When you were driving it, did idle raise or drop when you put the car in gear but held the clutch pedal down? Any hissing sounds from the passenger side? Did you get to see the cold start (revs up to 3000 RPM for a little and then drops holds at about 1500 RPM)? Could be vacuum leak anywhere or even on the intake manifold itself.
#16
Just cruising
Thread Starter
Join Date: Oct 2004
Location: Weirton, WV
Posts: 602
Likes: 0
Received 0 Likes
on
0 Posts
#17
Just cruising
Thread Starter
Join Date: Oct 2004
Location: Weirton, WV
Posts: 602
Likes: 0
Received 0 Likes
on
0 Posts
When you were driving it, did idle raise or drop when you put the car in gear but held the clutch pedal down?
I didn't notice the idling changing at all by putting it in gear. Why would/wouldn't the idle change?
Any hissing sounds from the passenger side?
No, I didn't notice any hissing.
Did you get to see the cold start (revs up to 3000 RPM for a little and then drops holds at about 1500 RPM)?
It doesn't have the cold start rev to 3000. To keep it running when its cold you just have to give it a little gas for about 30 seconds. The owner said that is because he had the throttle body modified when he had the engine rebuilt.
I didn't notice the idling changing at all by putting it in gear. Why would/wouldn't the idle change?
Any hissing sounds from the passenger side?
No, I didn't notice any hissing.
Did you get to see the cold start (revs up to 3000 RPM for a little and then drops holds at about 1500 RPM)?
It doesn't have the cold start rev to 3000. To keep it running when its cold you just have to give it a little gas for about 30 seconds. The owner said that is because he had the throttle body modified when he had the engine rebuilt.
I didn't notice the idling changing at all by putting it in gear. Why would/wouldn't the idle change?
Any hissing sounds from the passenger side?
No, I didn't notice any hissing.
Did you get to see the cold start (revs up to 3000 RPM for a little and then drops holds at about 1500 RPM)?
It doesn't have the cold start rev to 3000. To keep it running when its cold you just have to give it a little gas for about 30 seconds. The owner said that is because he had the throttle body modified when he had the engine rebuilt.
#20
Rotorhead
Join Date: Feb 2001
Location: Charlottesville, Virginia, USA
Posts: 9,136
Likes: 0
Received 39 Likes
on
33 Posts
In that case he should have no problem providing you with the receipt. Most decent shops have a 1-year warranty, so you should ask the shop if they will honor the warranty if you buy the car. They will also be able to tell you what kind of port they put on the engine, what exactly is new, and any problems that they know of.
Thread
Thread Starter
Forum
Replies
Last Post
Skeese
Adaptronic Engine Mgmt - AUS
65
03-28-17 03:30 PM
msilvia
3rd Generation Specific (1993-2002)
28
04-14-16 12:58 PM