Roadster engine speed decreasing while braking
Moderators: notoptoy, S Allen, Solex68
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- Roadster Nut
- Posts: 34
- Joined: Sun Mar 15, 2020 8:24 pm
- Location: Richmond, VA
- Model: 2000
- Year: High Windshield-68-70
Roadster engine speed decreasing while braking
Hoping someone might have an idea of what is causing this, the car is running amazing now except for when I go to use the brakes. As I slow down, in neutral or in gear, the engine speed begins to lower and if I brake hard enough the car cuts off (only once so far). I don't really know what is causing this issue so anything helps . Hopefully it isn't from all the burnouts, donuts, and fishtails I have been putting her through XD . That's what happens when you give a 20 year old a roadster hahaha. But seriously any input is welcome!! Not a major issue as car is running strong but still would like to find a fix. Didn't see any posts about this issue after looking for a little.
Thanks!
Sean
Thanks!
Sean
- mraitch
- Roadsteraholic
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Re: Roadster engine speed decreasing while braking
does this happen on a FULL tank of gas??
Peter Harrison
1970 1600 (Stroker) - TOAD SAN (Eliza)
1970 1600 (Stock) - As Yet Unnamed
Lake Balboa (SFV) , California
1970 1600 (Stroker) - TOAD SAN (Eliza)
1970 1600 (Stock) - As Yet Unnamed
Lake Balboa (SFV) , California
- notoptoy
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Re: Roadster engine speed decreasing while braking
I would check float levels at the carbs
"When all else fails, force prevails!" Ummm, we're gonna need a bigger hammer here.
67.5 SPL311 H20 w/5 speed
65 Impala Convertible
2017 C43 AMG
67.5 SPL311 H20 w/5 speed
65 Impala Convertible
2017 C43 AMG
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- Roadster Nut-Site Supporter
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Re: Roadster engine speed decreasing while braking
How well does it idle when sitting still?
located in Chester NH
1967 1600 in restoration
2013 Arctic Cat F-1100 turbo
Ford F-350 6.0
Ford 9000 puller, Ford 960 puller, Ford 901show, Ford 971 worker, Oliver 70 waiting its turn
1967 1600 in restoration
2013 Arctic Cat F-1100 turbo
Ford F-350 6.0
Ford 9000 puller, Ford 960 puller, Ford 901show, Ford 971 worker, Oliver 70 waiting its turn
- theunz
- Roadster Nut-Site Supporter
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- Model: 2000
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Re: Roadster engine speed decreasing while braking
If it is abrupt I would suspect electric short. If gradual then fuel related. Possibly gunk in tank.
Mike M
Old enough to know better, too old to remember why!
1969 2000 solex mine since 1972, under resurrection. (Finally resurrected as of spring 2019!)
1969 Porsche 911s -worth more, but not as valuable! Gone!
2017 Lotus Evora 400 - Oh my!!
Old enough to know better, too old to remember why!
1969 2000 solex mine since 1972, under resurrection. (Finally resurrected as of spring 2019!)
1969 Porsche 911s -worth more, but not as valuable! Gone!
2017 Lotus Evora 400 - Oh my!!
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- Roadster Nut
- Posts: 34
- Joined: Sun Mar 15, 2020 8:24 pm
- Location: Richmond, VA
- Model: 2000
- Year: High Windshield-68-70
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- Roadster Nut
- Posts: 34
- Joined: Sun Mar 15, 2020 8:24 pm
- Location: Richmond, VA
- Model: 2000
- Year: High Windshield-68-70
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- Roadster Nut
- Posts: 34
- Joined: Sun Mar 15, 2020 8:24 pm
- Location: Richmond, VA
- Model: 2000
- Year: High Windshield-68-70
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- Roadster Nut
- Posts: 34
- Joined: Sun Mar 15, 2020 8:24 pm
- Location: Richmond, VA
- Model: 2000
- Year: High Windshield-68-70
- jhayden
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Re: Roadster engine speed decreasing while braking
Your SRL has the free floating (not hinged) floats? Coating/repair of the brass floats is NEVER cost effective in the long run and will eventually cause problems of the type you describe. If your floats match the chambers, valves, etc.:
http://www.datsunroadster.com/PIC_PAGES ... t_info.htm
you should replace the brass with the plastic/composite floats. You will be happy that you did.
Jon
http://www.datsunroadster.com/PIC_PAGES ... t_info.htm
you should replace the brass with the plastic/composite floats. You will be happy that you did.
Jon
- Solex68
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Re: Roadster engine speed decreasing while braking
If you need a set of floats I have them for a 1600.
$50 a pair. Plus shipping
$50 a pair. Plus shipping
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Greg a.k.a SOLEX68 - http://www.datsunvents.com/
Laguna Hills, CA
68 2000
Always willing to help another Datsun Roadster owner
Pending installs: All steering components, Stan Stealth Dizzy
Laguna Hills, CA
68 2000
Always willing to help another Datsun Roadster owner
Pending installs: All steering components, Stan Stealth Dizzy
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- Roadster Nut
- Posts: 34
- Joined: Sun Mar 15, 2020 8:24 pm
- Location: Richmond, VA
- Model: 2000
- Year: High Windshield-68-70
Re: Roadster engine speed decreasing while braking
I went to get the new floats originally from rallye but sadly they did not have any in stock. My grandfather went ahead and coated the cracked float with the sealant used for sealing gas tanks. So far it works amazing with no noticeable difference in float level, after adjusting the mixture my issue went away.jhayden wrote: ↑Tue Nov 17, 2020 7:21 pm Your SRL has the free floating (not hinged) floats? Coating/repair of the brass floats is NEVER cost effective in the long run and will eventually cause problems of the type you describe. If your floats match the chambers, valves, etc.:
http://www.datsunroadster.com/PIC_PAGES ... t_info.htm
you should replace the brass with the plastic/composite floats. You will be happy that you did.
Jon
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- Roadster Nut
- Posts: 34
- Joined: Sun Mar 15, 2020 8:24 pm
- Location: Richmond, VA
- Model: 2000
- Year: High Windshield-68-70
Re: Roadster engine speed decreasing while braking
I have a 2000 body and transmission hooked up to an r16 engine lol. I appreciate the offer but I think I will ride out what I have no until I have some extra cash. (Just got a part time job finally haha)