1988 Accord idle surge when warm
Hi. I just purchased an '88 Accord LX Auto yesterday. It sat for 2
years without being started, and I started it up within 30 seconds with a new battery & some gas. 213K miles on the odometer. It runs great when it's cold. It's got power, starts right up, drives nice. When it's warm, the idle surges between 600RPM [15 seconds] 1500 rpm [15 seconds] and then 2500 rpm [15 seconds]. Then it repeats. When I give it gas, it bogs down the RPM until it dies. If I press the gas slow enough it will rev up to 3K before it dies. ONLY when its warm! Which sensor could be going out? Or is it a gizmo attached to the carburetor? Maybe the radiator was filled without bleeding the air bubble out of it? The guy that owned it knew nothing of mechanics. I come from a Chevy world, building oldschool V8's. :] ANY assistance would help! I don't know who to talk to about Honda tech. Thanks Sean |
Re: 1988 Accord idle surge when warm
<ssateren@gmail.com> wrote in message
news:1174523143.363762.80150@y66g2000hsf.googlegro ups.com... > Hi. I just purchased an '88 Accord LX Auto yesterday. It sat for 2 > years without being started, and I started it up within 30 seconds > with a new battery & some gas. 213K miles on the odometer. > > It runs great when it's cold. It's got power, starts right up, drives > nice. > When it's warm, the idle surges between 600RPM [15 seconds] 1500 rpm > [15 seconds] and then 2500 rpm [15 seconds]. Then it repeats. > > When I give it gas, it bogs down the RPM until it dies. > If I press the gas slow enough it will rev up to 3K before it dies. > > ONLY when its warm! > > Which sensor could be going out? Or is it a gizmo attached to the > carburetor? Maybe the radiator was filled without bleeding the air > bubble out of it? The guy that owned it knew nothing of mechanics. > > I come from a Chevy world, building oldschool V8's. :] > > > ANY assistance would help! I don't know who to talk to about Honda > tech. > > Thanks > > > Sean > > A good place to start is to make sure the coolant system is full - no air space in the radiator. If the coolant is low the temperature can't be measured reliably and the engine will surge. Weird, huh? It seems to be a Honda quirk. Mike |
Re: 1988 Accord idle surge when warm
On Mar 21, 5:31 pm, "Michael Pardee" <michaeltn...@cybertrails.com>
wrote: > <ssate...@gmail.com> wrote in message > > news:1174523143.363762.80150@y66g2000hsf.googlegro ups.com... > > > > > Hi. I just purchased an '88 Accord LX Auto yesterday. It sat for 2 > > years without being started, and I started it up within 30 seconds > > with a new battery & some gas. 213K miles on the odometer. > > > It runs great when it's cold. It's got power, starts right up, drives > > nice. > > When it's warm, the idle surges between 600RPM [15 seconds] 1500 rpm > > [15 seconds] and then 2500 rpm [15 seconds]. Then it repeats. > > > When I give it gas, it bogs down the RPM until it dies. > > If I press the gas slow enough it will rev up to 3K before it dies. > > > ONLY when its warm! > > > Which sensor could be going out? Or is it a gizmo attached to the > > carburetor? Maybe the radiator was filled without bleeding the air > > bubble out of it? The guy that owned it knew nothing of mechanics. > > > I come from a Chevy world, building oldschool V8's. :] > > > ANY assistance would help! I don't know who to talk to about Honda > > tech. > > > Thanks > > > Sean > > A good place to start is to make sure the coolant system is full - no air > space in the radiator. If the coolant is low the temperature can't be > measured reliably and the engine will surge. Weird, huh? It seems to be a > Honda quirk. > > Mike It's absolutely topped-off. I can run it for an hour, get it really hot, and take off the cap some minutes later & it's still absolutely full. I looked for the ECU to get some error codes from it -but I can't find it. I looked for the purge valve to bleed the air out of the coolant system - I can't seem to locate that either... Vacuum lines look well taken care of. Hm. Think this will pass emissions in Washington state tomorrow? :D UPDATE: It doesn't bog-down when hot. It runs fine when it's hot, but the idle still surges. Idle will not surge in gear. |
Re: 1988 Accord idle surge when warm
On Mar 21, 11:10 pm, ssate...@gmail.com wrote:
> On Mar 21, 5:31 pm, "Michael Pardee" <michaeltn...@cybertrails.com> > wrote: > > > > > <ssate...@gmail.com> wrote in message > > >news:1174523143.363762.80150@y66g2000hsf.googlegr oups.com... > > > > Hi. I just purchased an '88 Accord LX Auto yesterday. It sat for 2 > > > years without being started, and I started it up within 30 seconds > > > with a new battery & some gas. 213K miles on the odometer. > > > > It runs great when it's cold. It's got power, starts right up, drives > > > nice. > > > When it's warm, the idle surges between 600RPM [15 seconds] 1500 rpm > > > [15 seconds] and then 2500 rpm [15 seconds]. Then it repeats. > > > > When I give it gas, it bogs down the RPM until it dies. > > > If I press the gas slow enough it will rev up to 3K before it dies. > > > > ONLY when its warm! > > > > Which sensor could be going out? Or is it a gizmo attached to the > > > carburetor? Maybe the radiator was filled without bleeding the air > > > bubble out of it? The guy that owned it knew nothing of mechanics. > > > > I come from a Chevy world, building oldschool V8's. :] > > > > ANY assistance would help! I don't know who to talk to about Honda > > > tech. > > > > Thanks > > > > Sean > > > A good place to start is to make sure the coolant system is full - no air > > space in the radiator. If the coolant is low the temperature can't be > > measured reliably and the engine will surge. Weird, huh? It seems to be a > > Honda quirk. > > > Mike > > It's absolutely topped-off. I can run it for an hour, get it really > hot, and take off the cap some minutes later & it's still absolutely > full. > > I looked for the ECU to get some error codes from it -but I can't find > it. > > I looked for the purge valve to bleed the air out of the coolant > system - I can't seem to locate that either... > > Vacuum lines look well taken care of. Hm. > > Think this will pass emissions in Washington state tomorrow? > > :D > > UPDATE: > > It doesn't bog-down when hot. It runs fine when it's hot, but the idle > still surges. > > Idle will not surge in gear. i had something like that on my 87 and it was the some sort of choke issue with the carburator. i forget exactly but it was a relatively minor fix that he jerry- rigged...cheaper than a new carburator |
Re: 1988 Accord idle surge when warm
On Mar 22, 5:46 pm, "ben" <benm...@gmail.com> wrote:
> On Mar 21, 11:10 pm, ssate...@gmail.com wrote: > > > > > On Mar 21, 5:31 pm, "Michael Pardee" <michaeltn...@cybertrails.com> > > wrote: > > > > <ssate...@gmail.com> wrote in message > > > >news:1174523143.363762.80150@y66g2000hsf.googlegr oups.com... > > > > > Hi. I just purchased an '88 Accord LX Auto yesterday. It sat for 2 > > > > years without being started, and I started it up within 30 seconds > > > > with a new battery & some gas. 213K miles on the odometer. > > > > > It runs great when it's cold. It's got power, starts right up, drives > > > > nice. > > > > When it's warm, the idle surges between 600RPM [15 seconds] 1500 rpm > > > > [15 seconds] and then 2500 rpm [15 seconds]. Then it repeats. > > > > > When I give it gas, it bogs down the RPM until it dies. > > > > If I press the gas slow enough it will rev up to 3K before it dies. > > > > > ONLY when its warm! > > > > > Which sensor could be going out? Or is it a gizmo attached to the > > > > carburetor? Maybe the radiator was filled without bleeding the air > > > > bubble out of it? The guy that owned it knew nothing of mechanics. > > > > > I come from a Chevy world, building oldschool V8's. :] > > > > > ANY assistance would help! I don't know who to talk to about Honda > > > > tech. > > > > > Thanks > > > > > Sean > > > > A good place to start is to make sure the coolant system is full - no air > > > space in the radiator. If the coolant is low the temperature can't be > > > measured reliably and the engine will surge. Weird, huh? It seems to be a > > > Honda quirk. > > > > Mike > > > It's absolutely topped-off. I can run it for an hour, get it really > > hot, and take off the cap some minutes later & it's still absolutely > > full. > > > I looked for the ECU to get some error codes from it -but I can't find > > it. > > > I looked for the purge valve to bleed the air out of the coolant > > system - I can't seem to locate that either... > > > Vacuum lines look well taken care of. Hm. > > > Think this will pass emissions in Washington state tomorrow? > > > :D > > > UPDATE: > > > It doesn't bog-down when hot. It runs fine when it's hot, but the idle > > still surges. > > > Idle will not surge in gear. > > i had something like that on my 87 and it was the some sort of choke > issue with the carburator. > i forget exactly but it was a relatively minor fix that he jerry- > rigged...cheaper than a new carburator ha.. Thanks, but my choke is working satisfactorily. I've got a nice shop manual now. I've got 30 or so pages that troubleshoot this issue. Sweet, 4 hours of systematic vacuum/power/frequency analyzing. Freakin' Hon-duh. |
Re: 1988 Accord idle surge when warm
ssateren@gmail.com wrote in
news:1175016941.144845.276900@n76g2000hsh.googlegr oups.com: > On Mar 22, 5:46 pm, "ben" <benm...@gmail.com> wrote: >> On Mar 21, 11:10 pm, ssate...@gmail.com wrote: >> >> >> >> > On Mar 21, 5:31 pm, "Michael Pardee" <michaeltn...@cybertrails.com> >> > wrote: >> >> > > <ssate...@gmail.com> wrote in message >> >> > >news:1174523143.363762.80150@y66g2000hsf.googlegr oups.com... >> >> > > > Hi. I just purchased an '88 Accord LX Auto yesterday. It sat >> > > > for 2 years without being started, and I started it up within >> > > > 30 seconds with a new battery & some gas. 213K miles on the >> > > > odometer. >> >> > > > It runs great when it's cold. It's got power, starts right up, >> > > > drives nice. >> > > > When it's warm, the idle surges between 600RPM [15 seconds] >> > > > 1500 rpm [15 seconds] and then 2500 rpm [15 seconds]. Then it >> > > > repeats. >> >> > > > When I give it gas, it bogs down the RPM until it dies. >> > > > If I press the gas slow enough it will rev up to 3K before it >> > > > dies. >> >> > > > ONLY when its warm! >> >> > > > Which sensor could be going out? Or is it a gizmo attached to >> > > > the carburetor? Maybe the radiator was filled without bleeding >> > > > the air bubble out of it? The guy that owned it knew nothing of >> > > > mechanics. >> >> > > > I come from a Chevy world, building oldschool V8's. :] >> >> > > > ANY assistance would help! I don't know who to talk to about >> > > > Honda tech. >> >> > > > Thanks >> >> > > > Sean >> >> > > A good place to start is to make sure the coolant system is full >> > > - no air space in the radiator. If the coolant is low the >> > > temperature can't be measured reliably and the engine will surge. >> > > Weird, huh? It seems to be a Honda quirk. >> >> > > Mike >> >> > It's absolutely topped-off. I can run it for an hour, get it really >> > hot, and take off the cap some minutes later & it's still >> > absolutely full. >> >> > I looked for the ECU to get some error codes from it -but I can't >> > find it. >> >> > I looked for the purge valve to bleed the air out of the coolant >> > system - I can't seem to locate that either... >> >> > Vacuum lines look well taken care of. Hm. >> >> > Think this will pass emissions in Washington state tomorrow? >> >> > :D >> >> > UPDATE: >> >> > It doesn't bog-down when hot. It runs fine when it's hot, but the >> > idle still surges. >> >> > Idle will not surge in gear. >> >> i had something like that on my 87 and it was the some sort of choke >> issue with the carburator. >> i forget exactly but it was a relatively minor fix that he jerry- >> rigged...cheaper than a new carburator > > ha.. Thanks, but my choke is working satisfactorily. I've got a nice > shop manual now. I've got 30 or so pages that troubleshoot this issue. > Sweet, 4 hours of systematic vacuum/power/frequency analyzing. > Freakin' Hon-duh. > > > Newer Honda/Acuras are not so bad;they have EFI and fewer vacuum lines to deal with. No choke,either. -- Jim Yanik jyanik at kua.net |
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