diff --git a/tutorials/combustion/chemFoam/gri/constant/chemistryProperties b/tutorials/combustion/chemFoam/gri/constant/chemistryProperties
index e65509f3962c8ec4c430ea2fab6bf99729d409fe..314f83cc2da0f7328af993b2d37d22543bcf6ac4 100644
--- a/tutorials/combustion/chemFoam/gri/constant/chemistryProperties
+++ b/tutorials/combustion/chemFoam/gri/constant/chemistryProperties
@@ -23,7 +23,7 @@ chemistryType
 
 chemistry       on;
 
-initialChemicalTimeStep 1e-6;
+initialChemicalTimeStep 1e-7;
 
 EulerImplicitCoeffs
 {
@@ -33,9 +33,9 @@ EulerImplicitCoeffs
 
 odeCoeffs
 {
-    solver          Rosenbrock43;
+    solver          rodas32;
     absTol          1e-12;
-    relTol          1e-2;
+    relTol          1e-1;
 }
 
 
diff --git a/tutorials/combustion/chemFoam/h2/constant/chemistryProperties b/tutorials/combustion/chemFoam/h2/constant/chemistryProperties
index 2c0182864e6b26ac74a17767dff98e0d97028087..314f83cc2da0f7328af993b2d37d22543bcf6ac4 100644
--- a/tutorials/combustion/chemFoam/h2/constant/chemistryProperties
+++ b/tutorials/combustion/chemFoam/h2/constant/chemistryProperties
@@ -23,13 +23,19 @@ chemistryType
 
 chemistry       on;
 
-initialChemicalTimeStep 1e-10;
+initialChemicalTimeStep 1e-7;
+
+EulerImplicitCoeffs
+{
+    cTauChem        1;
+    equilibriumRateLimiter off;
+}
 
 odeCoeffs
 {
-    solver          SIBS;
+    solver          rodas32;
     absTol          1e-12;
-    relTol          1e-2;
+    relTol          1e-1;
 }
 
 
diff --git a/tutorials/combustion/chemFoam/ic8h18/constant/chemistryProperties b/tutorials/combustion/chemFoam/ic8h18/constant/chemistryProperties
index 7528b62231ac1def9a2febfeae547ff4a9919274..314f83cc2da0f7328af993b2d37d22543bcf6ac4 100644
--- a/tutorials/combustion/chemFoam/ic8h18/constant/chemistryProperties
+++ b/tutorials/combustion/chemFoam/ic8h18/constant/chemistryProperties
@@ -23,13 +23,19 @@ chemistryType
 
 chemistry       on;
 
-initialChemicalTimeStep 1e-10;
+initialChemicalTimeStep 1e-7;
+
+EulerImplicitCoeffs
+{
+    cTauChem        1;
+    equilibriumRateLimiter off;
+}
 
 odeCoeffs
 {
-    solver          SIBS;
+    solver          rodas32;
     absTol          1e-12;
-    relTol          1e-3;
+    relTol          1e-1;
 }
 
 
diff --git a/tutorials/combustion/chemFoam/nc7h16/constant/chemistryProperties b/tutorials/combustion/chemFoam/nc7h16/constant/chemistryProperties
index d7e58ddc143c14f35dbd33969ef4acdb6eba393d..aee69a3239ea0ba38d36b2315cbb9331a78c73a5 100644
--- a/tutorials/combustion/chemFoam/nc7h16/constant/chemistryProperties
+++ b/tutorials/combustion/chemFoam/nc7h16/constant/chemistryProperties
@@ -23,13 +23,19 @@ chemistryType
 
 chemistry       on;
 
-initialChemicalTimeStep 1e-10;
+initialChemicalTimeStep 1e-7;
+
+EulerImplicitCoeffs
+{
+    cTauChem        10;
+    equilibriumRateLimiter no;
+}
 
 odeCoeffs
 {
-    solver          SIBS;
+    solver          rodas32;
     absTol          1e-14;
-    relTol          1e-4;
+    relTol          1e-1;
 }